On the functional dependency and some generalizations of it. - János Demetrovics; Gy. Gyepesi (Acta Cybern., 1981)

A note on minimal matrix representation of closure operations. - János Demetrovics; Gy. Gyepesi (Comb., 1983)

Some generalized type functional dependencies formalized as equality set on matrices. - János Demetrovics; Gy. Gyepesi (Discret. Appl. Math., 1983)

LATOR - a Database Management System for Local Networks. - János Demetrovics; Gy. Gyepesi; László Hannák; Tibor Remzsö; F. Urbánszki (AIMSA, 1988)