TY - JOUR ID - acta35196 A1 - Vernikov Boris M. N1 - Bibliogr.: p. 107-109. Y1 - 2015/// TI - Special elements in lattices of semigroup varieties SP - 79 EP - 109 AV - restricted JF - Acta scientiarum mathematicarum KW - Matematika VL - 81 SN - 0001-6969 IS - 1-2 UR - http://www.acta.hu ER -