The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles. - Kalervo Järvelin; Pertti Vakkari (Inf. Process. Manag., 1993)

Theory growth in information science: applications of the theory of science to a theory of information seeking. - Pertti Vakkari; Martti Kuokkanen (J. Documentation, 1997)

Trends in ... a Critical Review: Growth of Theories on Information Seeking: An Analysis of Growth of a Theoretical Research Program on the Relation Between Task Complexity and Information Seeking. - Pertti Vakkari (Inf. Process. Manag., 1998)

Editorial: Information seeking in context (ISIC). - Carol Collier Kuhlthau; Pertti Vakkari (Inf. Process. Manag., 1999)

Task complexity, problem structure and information actions - Integrating studies on information seeking and retrieval. - Pertti Vakkari (Inf. Process. Manag., 1999)

Cognition and changes of search terms and tactics during task performance: A longitudinal case study. - Pertti Vakkari (RIAO, 2000)

Relevance and contributing information types of searched documents in task performance. - Pertti Vakkari (SIGIR, 2000)

Changes in relevance criteria and problem stages in task performance. - Pertti Vakkari; Nanna Hakala (J. Documentation, 2000)

Changes in Search Tactics and Relevance Judgements when Preparing a Research Proposal A Summary of the Findings of a Longitudinal Study. - Pertti Vakkari (Inf. Retr., 2001)

A theory of the task-based information retrieval process: a summary and generalisation of a longitudinal study. - Pertti Vakkari (J. Documentation, 2001)

Subject Knowledge, Source of Terms, and Term Selection in Query Expansion: An Analytical Study. - Pertti Vakkari (ECIR, 2002)

Advancing relevance research: Theory integration, methodological progress, and critical questions. Sponsored by SIG CRS, USE. - Peiling Wang; Katriina Byström; Colleen Cool; Stefano Mizzaro; Tefko Saracevic; Pertti Vakkari; Marilyn Domas White (ASIST, 2003)

Task-based information searching. - Pertti Vakkari (Annu. Rev. Inf. Sci. Technol., 2003)

Changes of search terms and tactics while writing a research proposal: A longitudinal case study. - Pertti Vakkari; Mikko Pennanen; Sami Serola (Inf. Process. Manag., 2003)

Students' conceptual structure, search process, and outcome while preparing a research proposal: A longitudinal case study. - Mikko Pennanen; Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2003)

Subject Knowledge, Thesaurus-assisted Query Expansion and Search Success. - Anne Sihvonen; Pertti Vakkari (RIAO, 2004)

Discipline, availability of electronic resources and the use of Finnish National Electronic Library - FinELib. - Sanna Törmä; Pertti Vakkari (Inf. Res., 2004)

The influence of relevance levels on the effectiveness of interactive information retrieval. - Pertti Vakkari; Eero Sormunen (J. Assoc. Inf. Sci. Technol., 2004)

Subject knowledge improves interactive query expansion assisted by a thesaurus. - Anne Sihvonen; Pertti Vakkari (J. Documentation, 2004)

Query exhaustivity, relevance feedback and search success in automatic and interactive query expansion. - Pertti Vakkari; Susan Jones; Andy MacFarlane; Eero Sormunen (J. Documentation, 2004)

Users' conceptual structure, search process and useful information types in the retrieved references. - Pertti Vakkari; Sami Serola; Mikko Pennanen (ASIST, 2005)

The Influence of the Scatter of Literature on the Use of Electronic Resources Across Disciplines: A Case Study of FinELib. - Pertti Vakkari; Sanna Talja (ECDL, 2005)

The anticipated and assessed contribution of information types in references retrieved for preparing a research proposal. - Sami Serola; Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2005)

Trends in the use of digital libraries by scientists in 2000-2005: A case study of finelib. - Pertti Vakkari (ASIST, 2006)

Situational relevance and task outcome. - Saila Huuskonen; Pertti Vakkari (IIiX, 2006)

Searching for electronic journal articles to support academic tasks. A case study of the use of the Finnish National Electronic Library (FinELib). - Pertti Vakkari; Sanna Talja (Inf. Res., 2006)

Impact of research cultures on the use of digital library resources. - Sanna Talja; Pertti Vakkari; Jenny Fry; Paul Wouters (J. Assoc. Inf. Sci. Technol., 2007)

Perceived influence of the use of electronic information resources on scholarly work and publication productivity. - Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2008)

How a general and a specific thesaurus cover expressions in patients' questions and physicians' answers. - Johanna Eerola; Pertti Vakkari (J. Documentation, 2008)

Students' search process and outcome in Medline in writing an essay for a class on evidence-based medicine. - Saila Huuskonen; Pertti Vakkari (J. Documentation, 2008)

Comparing Google to Ask-a-Librarian Service for Answering Factual and Topical Questions. - Pertti Vakkari; Mari Taneli (ECDL, 2009)

Question types in public libraries' digital reference service in Finland: Comparing 1999 and 2006. - Piritta Numminen; Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2009)

Lay persons' and professionals' nutrition-related vocabularies and their matching to a general and a specific thesaurus. - Tuula Poikonen; Pertti Vakkari (J. Inf. Sci., 2009)

Client information system as an everyday information tool in child protection work. - Saila Huuskonen; Pertti Vakkari (IIiX, 2010)

Client's Temporal Trajectory in Child Protection: Piecing Information Together in a Client Information System. - Saila Huuskonen; Pertti Vakkari (INTERACT (4), 2011)

Comparing Google to a digital reference service for answering factual and topical requests by keyword and question queries. - Pertti Vakkari (Online Inf. Rev., 2011)

Readers' search strategies for accessing books in public libraries. - Anna Mikkonen; Pertti Vakkari (IIiX, 2012)

In search of a good novel, neither reading activity nor querying matter, but examining search results does. - Suvi Oksanen; Pertti Vakkari (IIiX, 2012)

Emphasis on examining results in fiction searches contributes to finding good novels. - Suvi Oksanen; Pertti Vakkari (JCDL, 2012)

Search effort degrades search output but improves task outcome. - Pertti Vakkari; Saila Huuskonen (J. Assoc. Inf. Sci. Technol., 2012)

Internet use increases the odds of using the public library. - Pertti Vakkari (J. Documentation, 2012)

The Role of Search Interface Features during Information Seeking. - Abdigani Diriye; Ann Blandford; Anastasios Tombros; Pertti Vakkari (TPDL, 2013)

Selecting Fiction in Library Catalogs: A Gaze Tracking Study. - Janna Pöntinen; Pertti Vakkari (TPDL, 2013)

"I Did It My Way": Social workers as secondary designers of a client information system. - Saila Huuskonen; Pertti Vakkari (Inf. Process. Manag., 2013)

Task complexity affects information use: a questionnaire study in city administration. - Miamaria Saastamoinen; Sanna Kumpulainen; Pertti Vakkari; Kalervo Järvelin (Inf. Res., 2013)

A sign of a good book: readers' methods of accessing fiction in the public library. - Katariina Saarinen; Pertti Vakkari (J. Documentation, 2013)

Books' interest grading and dwell time in metadata in selecting fiction. - Pertti Vakkari; Arto Luoma; Janna Pöntinen (IIiX, 2014)

Evolution of library and information science, 1965-2005: Content analysis of journal articles. - Otto Tuomaala; Kalervo Järvelin; Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2014)

Models explaining the perceived outcomes of public libraries. - Pertti Vakkari (J. Documentation, 2014)

Perceived outcomes of public libraries in Finland, Norway and the Netherlands. - Pertti Vakkari; Svanhild Aabø; Ragnar Andreas Audunson; Frank Huysmans; Marjolein Oomes (J. Documentation, 2014)

Supporting navigation in Wikipedia by information visualization: extended evaluation measures. - I-Chin Wu; Pertti Vakkari (J. Documentation, 2014)

Evaluation methodologies in information retrieval dagstuhl seminar 13441. - Maristella Agosti; Norbert Fuhr; Elaine G. Toms; Pertti Vakkari (SIGIR Forum, 2014)

Books' Interest Grading and Fiction Readers' Search Actions During Query Reformulation Intervals. - Anna Mikkonen; Pertti Vakkari (JCDL, 2015)

Result List Actions in Fiction Search. - Pertti Vakkari; Janna Pöntinen (JCDL, 2015)

Task-Based Information Interaction Evaluation: The Viewpoint of Program Theory. - Kalervo Järvelin; Pertti Vakkari; Paavo Arvola; Feza Baskaya; Anni Järvelin; Jaana Kekäläinen; Heikki Keskustalo; Sanna Kumpulainen; Miamaria Saastamoinen; Reijo Savolainen; Eero Sormunen (ACM Trans. Inf. Syst., 2015)

Readers' interest criteria in fiction book search in library catalogs. - Anna Mikkonen; Pertti Vakkari (J. Documentation, 2016)

A typology of music information for studies on information seeking. - Antti Mikael Rousi; Reijo Savolainen; Pertti Vakkari (J. Documentation, 2016)

Patterns of perceived public library outcomes in five countries. - Pertti Vakkari; Svanhild Aabø; Ragnar Audunson; Frank Huysmans; Nahyun Kwon; Marjolein Oomes; Sei-Ching Joanna Sin (J. Documentation, 2016)

Searching as learning: A systematization based on literature. - Pertti Vakkari (J. Inf. Sci., 2016)

Reader characteristics, behavior, and success in fiction book search. - Anna Mikkonen; Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2017)

Information repertoires: media use patterns in various gratification contexts. - Sei-Ching Joanna Sin; Pertti Vakkari (J. Documentation, 2017)

Information Search Processes in Complex Tasks. - Pertti Vakkari (CHIIR, 2018)

Predicting Retrieval Success Based on Information Use for Writing Tasks. - Pertti Vakkari; Michael Völske; Martin Potthast; Matthias Hagen; Benno Stein 001 (TPDL, 2018)

Effects of subject-oriented visualization tools on search by novices and intermediates. - I-Chin Wu; Pertti Vakkari (J. Assoc. Inf. Sci. Technol., 2018)

Situational relevance of music information modes: An empirical investigation among Doctor of Music students. - Antti Mikael Rousi; Reijo Savolainen; J. Tuomas Harviainen; Pertti Vakkari (J. Documentation, 2018)

Modeling the usefulness of search results as measured by information use. - Pertti Vakkari; Michael Völske; Martin Potthast; Matthias Hagen; Benno Stein 001 (Inf. Process. Manag., 2019)

Adopting situationally relevant modes of music information at different stages of information-seeking processes. - Antti Mikael Rousi; Reijo Savolainen; Pertti Vakkari (J. Documentation, 2019)

The Usefulness of Search Results: A Systematization of Types and Predictors. - Pertti Vakkari (CHIIR, 2020)

The role of readers' literary preferences in predicting success in fiction search. - Pertti Vakkari; Anna Mikkonen (J. Documentation, 2020)

Learning Outcomes during Information Search in Digital Archives. - I-Chin Wu; Bo-Xian Huang; Pertti Vakkari (ASIST, 2021)

Predicting essay quality from search and writing behavior. - Pertti Vakkari; Michael Völske; Martin Potthast; Matthias Hagen; Benno Stein 001 (J. Assoc. Inf. Sci. Technol., 2021)

Disciplinary contributions to research topics and methodology in Library and Information Science - Leading to fragmentation? - Pertti Vakkari; Yu-Wei Chang 001; Kalervo Järvelin (J. Assoc. Inf. Sci. Technol., 2022)

LIS research across 50 years: content analysis of journal articles. - Kalervo Järvelin; Pertti Vakkari (J. Documentation, 2022)

Largest contribution to LIS by external disciplines as measured by the characteristics of research articles. - Pertti Vakkari; Yu-Wei Chang 001; Kalervo Järvelin (Scientometrics, 2022)

A Probabilistic Model Toward How People Search to Build Outcomes. - Yuli Zhao; Yuyang Bai; Yin Zhang; Bin Zhang; Pertti Vakkari (IEEE Access, 2023)

The association of disciplinary background with the evolution of topics and methods in Library and Information Science research 1995-2015. - Pertti Vakkari; Kalervo Järvelin; Yu-Wei Chang 001 (J. Assoc. Inf. Sci. Technol., 2023)

Who cites the contributions by information science? - Kalervo Järvelin; Pertti Vakkari (J. Documentation, 2024)

What characterizes LIS as a fragmenting discipline? - Pertti Vakkari (J. Documentation, 2024)

An exploration of search-as-learning in digital archives of an online museum. - I-Chin Wu; Pertti Vakkari; Bo-Xian Huang (J. Documentation, 2024)

Characteristics of LIS research articles affecting their citation impact. - Kalervo Järvelin; Yu-Wei Chang 001; Pertti Vakkari (J. Libr. Inf. Sci., 2024)

Comparing representations of a discipline derived through LDA vs. intellectual content analysis: the case of information science. - Kaisa Ylikruuvi; Kalervo Järvelin; Pertti Vakkari; Martti Juhola (Scientometrics, 2025)