Finding Non-local Dependencies: Beyond Pattern Matching. - Valentin Jijkoun (ACL (Companion), 2003)

How Frogs Built the Berlin Wall: A Detailed Error Analysis of a Question Answering System for Dutch. - Valentin Jijkoun; Gilad Mishne; Maarten de Rijke (CLEF, 2003)

The University of Amsterdam at QA@CLEF2003. - Valentin Jijkoun; Gilad Mishne; Maarten de Rijke (CLEF (Working Notes), 2003)

The University of Amsterdam at the TREC 2003 Question Answering Track. - Valentin Jijkoun; Gilad Mishne; Christof Monz; Maarten de Rijke; Stefan Schlobach; Oren Tsur (TREC, 2003)

Enriching the Output of a Parser Using Memory-based Learning. - Valentin Jijkoun; Maarten de Rijke (ACL, 2004)

Making Stone Soup: Evaluating a Recall-Oriented Multi-stream Question Answering System for Dutch. - David Ahn; Valentin Jijkoun; Karin Müller 001; Maarten de Rijke; Stefan Schlobach; Gilad Mishne (CLEF, 2004)

The University of Amsterdam at QA@CLEF 2004. - Valentin Jijkoun; Gilad Mishne; Maarten de Rijke; Stefan Schlobach; David Ahn; Karin Müller 001 (CLEF (Working Notes), 2004)

Information Extraction for Question Answering: Improving Recall Through Syntactic Patterns. - Valentin Jijkoun; Jori Mur; Maarten de Rijke (COLING, 2004)

Answer Selection in a Multi-stream Open Domain Question Answering System. - Valentin Jijkoun; Maarten de Rijke (ECIR, 2004)

The University of Amsterdam at Senseval-3: Semantic roles and Logic forms. - David Ahn; Sisay Fissaha; Valentin Jijkoun; Maarten de Rijke (SENSEVAL@ACL, 2004)

Using Wikipedia at the TREC QA Track. - David Ahn; Valentin Jijkoun; Gilad Mishne; Karin Müller 001; Maarten de Rijke; Stefan Schlobach (TREC, 2004)

Retrieving answers from frequently asked questions pages on the web. - Valentin Jijkoun; Maarten de Rijke (CIKM, 2005)

Towards an Offline XML-Based Strategy for Answering Questions. - David Ahn; Valentin Jijkoun; Karin Müller 001; Maarten de Rijke; Erik F. Tjong Kim Sang (CLEF, 2005)

The University of Amsterdam at QA@CLEF 2005. - David Ahn; Valentin Jijkoun; Karin Müller 001; Maarten de Rijke; Erik F. Tjong Kim Sang (CLEF (Working Notes), 2005)

Recognizing Textual Entailment: Is Word Similarity Enough?. - Valentin Jijkoun; Maarten de Rijke (MLCW, 2005)

Towards a Multi-Stream Question Answering-As-XML-Retrieval Strategy. - David Ahn; Sisay Fissaha Adafre; Valentin Jijkoun; Karin Müller 001; Maarten de Rijke; Erik F. Tjong Kim Sang (TREC, 2005)

Using a Reference Corpus as a User Model for Focused Information Retrieval. - Gilad Mishne; Maarten de Rijke; Valentin Jijkoun (J. Digit. Inf. Manag., 2005)

Representing and Querying Multi-dimensional Markup for Question Answering. - Wouter Alink; Valentin Jijkoun; David Ahn; Maarten de Rijke; Peter A. Boncz; Arjen P. de Vries (NLPXML@EACL, 2006)

Link-Based vs. Content-Based Retrieval for Question Answering Using Wikipedia. - Sisay Fissaha Adafre; Valentin Jijkoun; Maarten de Rijke (CLEF, 2006)

The University of Amsterdam at WiQA 2006. - Sisay Fissaha Adafre; Valentin Jijkoun; Maarten de Rijke (CLEF (Working Notes), 2006)

Quartz: A Question Answering System for Dutch. - David Ahn; Valentin Jijkoun; Joris van Rantwijk; Maarten de Rijke; Erik F. Tjong Kim Sang (CLEF, 2006)

Overview of the WiQA Task at CLEF 2006. - Valentin Jijkoun; Maarten de Rijke (CLEF, 2006)

Overview of WiQA 2006. - Valentin Jijkoun; Maarten de Rijke (CLEF (Working Notes), 2006)

The University of Amsterdam at CLEF@QA 2006. - Valentin Jijkoun; Joris van Rantwijk; David Ahn; Erik F. Tjong Kim Sang; Maarten de Rijke (CLEF (Working Notes), 2006)

Overview of the CLEF 2006 Multilingual Question Answering Track. - Bernardo Magnini; Danilo Giampiccolo; Pamela Forner; Christelle Ayache; Valentin Jijkoun; Petya Osenova; Anselmo Peñas; Paulo Rocha 001; Bogdan Sacaleanu; Richard F. E. Sutcliffe (CLEF, 2006)

"More like these": growing entity classes from seeds. - Luís Sarmento; Valentin Jijkoun; Maarten de Rijke; Eugénio C. Oliveira (CIKM, 2007)

Overview of the CLEF 2007 Multilingual Question Answering Track. - Danilo Giampiccolo; Pamela Forner; Jesús Herrera; Anselmo Peñas; Christelle Ayache; Corina Forascu; Valentin Jijkoun; Petya Osenova; Paulo Rocha 001; Bogdan Sacaleanu; Richard F. E. Sutcliffe (CLEF, 2007)

Overview of the CLEF 2007 Multilingual Question Answering Track. - Danilo Giampiccolo; Pamela Forner; Anselmo Peñas; Christelle Ayache; Dan Cristea; Valentin Jijkoun; Petya Osenova; Paulo Rocha 001; Bogdan Sacaleanu; Richard F. E. Sutcliffe (CLEF (Working Notes), 2007)

The University of Amsterdam's Question Answering System at QA@CLEF 2007. - Valentin Jijkoun; Katja Hofmann; David Ahn; Mahboob Alam Khalid; Joris van Rantwijk; Maarten de Rijke; Erik F. Tjong Kim Sang (CLEF, 2007)

The University of Amsterdam at CLEF@QA 2007. - Valentin Jijkoun; Katja Hofmann; David Ahn; Mahboob Alam Khalid; Joris van Rantwijk; Maarten de Rijke; Erik F. Tjong Kim Sang (CLEF (Working Notes), 2007)

Overview of WebCLEF 2007. - Valentin Jijkoun; Maarten de Rijke (CLEF, 2007)

Using Centrality to Rank Web Snippets. - Valentin Jijkoun; Maarten de Rijke (CLEF, 2007)

The University of Amsterdam at WebCLEF 2007: Using Centrality to Rank Web Snippets. - Valentin Jijkoun; Maarten de Rijke (CLEF (Working Notes), 2007)

Machine Learning for Question Answering from Tabular Data. - Mahboob Alam Khalid; Valentin Jijkoun; Maarten de Rijke (DEXA Workshops, 2007)

WiQA: Evaluating Multi-lingual Focused Access to Wikipedia. - Valentin Jijkoun; Maarten de Rijke (EVIA@NTCIR, 2007)

The University of Amsterdam at the TREC 2007 QA Track. - Katja Hofmann; Valentin Jijkoun; Mahboob Alam Khalid; Joris van Rantwijk; Erik F. Tjong Kim Sang (TREC, 2007)

Fact Discovery in Wikipedia. - Sisay Fissaha Adafre; Valentin Jijkoun; Maarten de Rijke (Web Intelligence, 2007)

Electoral search using the VerkiezingsKijker: an experience report. - Valentin Jijkoun; Maarten Marx; Maarten de Rijke; Frank van Waveren (WWW, 2007)

Data-driven type checking in open domain question answering. - Stefan Schlobach; David Ahn; Maarten de Rijke; Valentin Jijkoun (J. Appl. Log., 2007)

Overview of WebCLEF 2008. - Valentin Jijkoun; Maarten de Rijke (CLEF, 2008)

Overview of WebCLEF 2008 (Draft). - Valentin Jijkoun; Maarten de Rijke (CLEF (Working Notes), 2008)

The Impact of Named Entity Normalization on Information Retrieval for Question Answering. - Mahboob Alam Khalid; Valentin Jijkoun; Maarten de Rijke (ECIR, 2008)

Named entity normalization in user generated content. - Valentin Jijkoun; Mahboob Alam Khalid; Maarten Marx; Maarten de Rijke (AND, 2008)

The University of Amsterdam at TAC 2008 Question Answering Track. - Valentin Jijkoun; Maarten de Rijke (TAC, 2008)

Generating a Non-English Subjectivity Lexicon: Relations That Matter. - Valentin Jijkoun; Katja Hofmann (EACL, 2009)

Generating Focused Topic-Specific Sentiment Lexicons. - Valentin Jijkoun; Maarten de Rijke; Wouter Weerkamp (ACL, 2010)

Bootstrapping subjectivity detection. - Valentin Jijkoun; Maarten de Rijke (SIGIR, 2011)

DIR 2011: the eleventh Dutch-Belgian information retrieval workshop. - Corrado Boscarino; Katja Hofmann; Valentin Jijkoun; Edgar Meij; Maarten de Rijke; Wouter Weerkamp (SIGIR Forum, 2011)

Generating, Refining and Using Sentiment Lexicons. - Maarten de Rijke; Valentin Jijkoun; Fons Laan; Wouter Weerkamp; Paul Ackermans; Gijs Geleijnse (Essential Speech and Language Technology for Dutch, 2013)

Employer Industry Classification Using Job Postings. - Mahak Goindani; Qiaoling Liu; Josh Chao; Valentin Jijkoun (ICDM Workshops, 2017)

Lessons Learned from Developing and Deploying a Large-Scale Employer Name Normalization System for Online Recruitment. - Qiaoling Liu; Josh Chao; Thomas Mahoney; Alan Chern; Chris Min; Faizan Javed; Valentin Jijkoun (KDD, 2018)