Knowledge Engineering Research and Training at the Department of Scientifioc and Technical Information, Prague School of Economics. - Jirí Ivánek; Petr Berka; Jan Ferjencík; B. Stejskal (Artificial Intelligence in Higher Education, 1989)

Inference in expert systems based on complete multivalued logic. - Jirí Ivánek; Josef Svenda; Jan Ferjencík (Kybernetika, 1989)