The cardinality of closed sets in pre-complete classes in k-valued logics. - János Demetrovics; László Hannák (Acta Cybern., 1979)

On the number of maximal dependencies in a data base relation of fixed order. - A. Békéssy; János Demetrovics; László Hannák; Peter Frankl; Gyula O. H. Katona (Discret. Math., 1980)

A Taxonomy of Conceptual Foundations. - Elöd Knuth; László Hannák; Péter Radó (DS-2, 1986)

Notes on conceptual representations. - Elöd Knuth; László Hannák; Ágnes Hernádi (ISMIS, 1986)

Construction of Large Sets of Clones. - János Demetrovics; László Hannák (Math. Log. Q., 1987)

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