Designing Government Portal Navigation Around Citizens' Needs. - Rob Klaassen; Joyce Karreman; Thea van der Geest (EGOV, 2006)

User-centered evaluation of adaptive and adaptable systems: a literature review. - Lex van Velsen; Thea van der Geest; Rob Klaassen; Michaël F. Steehouder (Knowl. Eng. Rev., 2008)

Identifying Usability Issues for Personalization During Formative Evaluations: A Comparison of Three Methods. - Lex van Velsen; Thea van der Geest; Rob Klaassen (Int. J. Hum. Comput. Interact., 2011)