Empirical Evaluation of MPEG-7 XM Color Descriptors in Content-Based Retrieval of Semantic Image Categories. - Timo Ojala; Markus Aittola; Esa Matinmikko (ICPR (2), 2002)

SmartLibrary - Location-Aware Mobile Library Service. - Markus Aittola; Tapio Ryhänen; Timo Ojala (Mobile HCI, 2003)

Comparison of Mobile and Fixed Use of SmartLibrary. - Markus Aittola; Pekka Parhi; Maria Vieruaho; Timo Ojala (Mobile HCI, 2004)