On a congruence lattice representations

HAVIAR, Alfonz. On a congruence lattice representations. In JANIŠ, Vladimír - MONOSZOVÁ, Gabriela. Acta Universitatis Matthiae Belii : Natural Sciences Series. Series Mathematic. No. 2. - Banská Bystrica : Univerzita Mateja Bela, 1994. ISBN 80-85162-73-3, 9-16.