TY - JOUR AU - Chajda, Ivan TI - Varieties with modular and distributive lattices of symmetric or reflexive relations JO - Czechoslovak Mathematical Journal PY - 1992 SP - 623 EP - 630 VL - 42 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128357/ DO - 10.21136/CMJ.1992.128357 LA - en ID - 10_21136_CMJ_1992_128357 ER -