Formative Evaluation in Document Design: Validity of the Plus-Minus Method For the Pretesting of Public Information Brochures. - Menno D. T. de Jong; Peter Jan Schellens (IPCC (2), 1998)

Retrospective vs. concurrent think-aloud protocols: testing the usability of an online library catalogue. - Maaike J. Van den Haak; Menno D. T. de Jong; Peter Jan Schellens (Behav. Inf. Technol., 2003)

Employing think-aloud protocols and constructive interaction to test the usability of online library catalogues: a methodological comparison. - Maaike J. Van den Haak; Menno D. T. de Jong; Peter Jan Schellens (Interact. Comput., 2004)

Evaluating municipal websites: A methodological comparison of three think-aloud variants. - Maaike J. Van den Haak; Menno D. T. de Jong; Peter Jan Schellens (Gov. Inf. Q., 2009)