Author-Defined Storage in the Next Generation Learning Management Systems. - Olivier Sessink; Rik Beeftink; Johannes Tramper; Rob J. M. Hartog (ICALT, 2003)

Securing Web-Based Exams. - Olivier Sessink; Rik Beeftink; Johannes Tramper; Rob J. M. Hartog (J. Univers. Comput. Sci., 2004)