Fuzzy-Datenanalyse durch kontextbasierte Datenbankanfragen. - Günter Schindler (DUV, Dt. Univ.-Verlag, 1998)

Concept and Implementation of a Fuzzy Classification Query Language. - Nicolas Werro; Andreas Meier 001; Christian Mezger; Günter Schindler (DMIN, 2005)

Fuzzy Classification on Relational Databases. - Andreas Meier 001; Günter Schindler; Nicolas Werro (Handbook of Research on Fuzzy Information Processing in Databases, 2008)