According to our database1, Per Ahlgren authored at least 25 papers between 1999 and 2019.
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Comparison of publication-level approaches to ex-post citation normalization.
Disciplinary structures in Nature, Science and PNAS: journal and country levels.
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics.
J. Informetrics, 2018
Exploring the relation between referencing practices and citation impact: A large-scale study based on Web of Science data.
Evolution of three Nobel Prize themes and a Nobel snub theme in chemistry: a bibliometric study with focus on international collaboration.
Reply to 'Comment on "Using multi-level frontiers in DEA models to grade countries/territories" by G.-l. Yang et al. [Journal of Informetrics 10(1) (2016), 238-253]'.
J. Informetrics, 2017
Using multi-level frontiers in DEA models to grade countries/territories.
J. Informetrics, 2016
Bibliometric analysis of two subdomains in philosophy: free will and sorites.
Grading Countries/Territories Using DEA Frontiers.
Proceedings of ISSI 2015 Istanbul: 15th International Society of Scientometrics and Informetrics Conference, 2015
The correlation between citation-based and expert-based assessments of publication channels: SNIP and SJR vs. Norwegian quality assessments.
J. Informetrics, 2014
Geographical distance in bibliometric relations within epistemic communities.
Experimental comparison of first and second-order similarities in a scientometric context.
Field normalized citation rates, field normalized journal impact and Norwegian weights for allocation of university research funds.
The effects and their stability of field normalization baseline on relative performance with respect to citation impact: A case study of 20 natural science departments.
J. Informetrics, 2011
Measuring impact of twelve information scientists using the DCI index.
Document-document similarity approaches and science mapping: Experimental comparison of five approaches.
J. Informetrics, 2009
Bibliographic coupling, common abstract stems and clustering: A comparison of two document-document similarity approaches in the context of science mapping.
Evaluation of retrieval effectiveness with incomplete relevance data: Theoretical and experimental comparison of three measures.
Inf. Process. Manage., 2008
Indexing strategies for Swedish full text retrieval under different user scenarios.
Inf. Process. Manage., 2007
Swedish full text retrieval: Effectiveness of different combinations of indexing strategies with query terms.
Inf. Retr., 2006
Retrieval evaluation with incomplete relevance data: a comparative study of three measures.
Proceedings of the 2006 ACM CIKM International Conference on Information and Knowledge Management, 2006
Rejoinder: In defense of formal methods.
Author cocitation analysis and Pearson's r.
Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient.
On a Cognitive Search Strategy.
Proceedings of the Digital Libraries: Interdisciplinary Concepts, 1999