Evaluation of IPAQ questionnaire by FCA. - Vladimir Sklenar; Jiri Zacpal; Erik Sigmund (CLA, 2005)

Evaluation of Questionnaires Supported by Formal Concept Analysis. - Radim Belohlávek; Vladimir Sklenar; Jiri Zacpal; Erik Sigmund (CLA, 2007)

Evaluation of IPAQ questionnaires supported by formal concept analysis. - Radim Belohlávek; Erik Sigmund; Jiri Zacpal (Inf. Sci., 2011)