Speaker verification in the telephone network: research activities in the cave project. - Frédéric Bimbot; Hans-Peter Hutter; Cédric Jaboulet; Johan Koolwaaij; Johan Lindberg; Jean-Benoît Pierrot (EUROSPEECH, 1997)

On the independence of digits in connected digit strings. - Johan Koolwaaij; Lou Boves (EUROSPEECH, 1997)

A new procedure for classifying speakers in speaker verification systems. - Johan Koolwaaij; Lou Boves (EUROSPEECH, 1997)

A comparison of a priori threshold setting procedures for speaker verification in the CAVE project. - Jean-Benoît Pierrot; Johan Lindberg; Johan Koolwaaij; Hans-Peter Hutter; Dominique Genoud; Mats Blomberg; Frédéric Bimbot (ICASSP, 1998)

The use of broad phonetic class models in speaker recognition. - Johan Koolwaaij; Johan de Veth (ICSLP, 1998)

A comparative evaluation of variance flooring techniques in HMM-based speaker verification. - Håkan Melin; Johan Koolwaaij; Johan Lindberg; Frédéric Bimbot (ICSLP, 1998)

An overview of the PICASSO project research activities in speaker verification for telephone applications. - Frédéric Bimbot; Mats Blomberg; Lou Boves; Gérard Chollet; Cédric Jaboulet; Bruno Jacob; Jamal Kharroubi; Johan Koolwaaij; Johan Lindberg; Johnny Mariéthoz; Chafic Mokbel; Houda Mokbel (EUROSPEECH, 1999)

On model quality and evaluation in speaker verification. - Johan Koolwaaij; Lou Boves; Hans Jongebloed; Els den Os (ICASSP, 2000)

Local Normalization and Delayed Decision Making in Speaker Detection and Tracking. - Johan Koolwaaij; Lou Boves (Digit. Signal Process., 2000)

An overview of the CAVE project research activities in speaker verification. - Frédéric Bimbot; Mats Blomberg; Lou Boves; Dominique Genoud; Hans-Peter Hutter; Cédric Jaboulet; Johan Koolwaaij; Johan Lindberg; Jean-Benoît Pierrot (Speech Commun., 2000)

Extending UDDI with Context-Aware Features Based on Semantic Service Descriptions. - Stanislav Pokraev; Johan Koolwaaij; Martin Wibbels (ICWS, 2003)

Context-Aware Recommendations in the Mobile Tourist Application COMPASS. - Mark van Setten; Stanislav Pokraev; Johan Koolwaaij (AH, 2004)

Context-Aware, Ontology-Based Service Discovery. - Tom H. F. Broens; Stanislav Pokraev; Marten van Sinderen; Johan Koolwaaij; Patricia Dockhorn Costa (EUSAI, 2004)

Service Platform for Rapid Development and Deployment of Context-Aware, Mobile Applications. - Stanislav Pokraev; Johan Koolwaaij; Mark van Setten; Tom H. F. Broens; Patricia Dockhorn Costa; Martin Wibbels; Peter Ebben; Patrick Strating (ICWS, 2005)

Identifying meaningful locations. - Petteri Nurmi; Johan Koolwaaij (MobiQuitous, 2006)

Introducing IYOUIT. - Sebastian Böhm; Johan Koolwaaij; Marko Luther; Bertrand Souville; Matthias Wagner 001; Martin Wibbels (ISWC, 2008)

IYOUIT - Share, Life, Blog, Play. - Sebastian Böhm; Johan Koolwaaij; Marko Luther; Bertrand Souville; Matthias Wagner 001; Martin Wibbels (ISWC (Posters & Demos), 2008)

Share Whatever You Like. - Sebastian Böhm; Johan Koolwaaij; Marko Luther (Electron. Commun. Eur. Assoc. Softw. Sci. Technol., 2008)

ContextKing: Virtual Kingdoms in Real Life. - Johan Koolwaaij; Martin Wibbels; Sebastian Böhm; Marko Luther (VS-GAMES, 2009)

Living virtual history. - Johan Koolwaaij; Martin Wibbels; Sebastian Böhm; Marko Luther (Vis. Comput., 2009)

Studying mobile context-aware social services in the wild. - Paul Holleis; Matthias Wagner 001; Sebastian Böhm; Johan Koolwaaij (NordiCHI, 2010)

User Behaviour Captured by Mobile Phones. - Wouter B. Teeuw; Johan Koolwaaij; Arjan J. H. Peddemors (AmI Workshops, 2011)

Tripzoom: an app to improve your mobility behavior. - Gregor Broll; Hu Cao; Peter Ebben; Paul Holleis; Koen Jacobs; Johan Koolwaaij; Marko Luther; Bertrand Souville (MUM, 2012)