The time geography project: using computer graphics to visualize problems in social science. - Kajsa Ellegård; Johan Torne; Henric Joanson; Anders Ynnerman; Matthew Cooper 001; Mark Ollila (SIGGRAPH Abstracts and Applications, 2002)

Everyday Life Discoveries: Mining and Visualizing Activity Patterns in Social Science Diary Data. - Katerina Vrotsou; Kajsa Ellegård; Matthew Cooper 001 (IV, 2007)

PODD: a portable diary data collection system. - Katerina Vrotsou; Mathias Bergqvist; Matthew Cooper 001; Kajsa Ellegård (AVI, 2014)