The ARCHIMEDES Network System; A System for Searching and Accessing Information in Multiple Multimedia Sources. - Jan L. G. Dietz; Ruud W. van der Pol; Floris Wiesman (J. Intell. Inf. Syst., 1997)

Dipe-R: a knowledge representation language. - Ruud W. van der Pol (Data Knowl. Eng., 2003)

Dipe-D: A Tool for Knowledge-Based Query Formulation in Information Retrieval. - Ruud W. van der Pol (Inf. Retr., 2003)