TY - JOUR AU - S. S. Marchenkov TI - On the structure of equationally closed classes JO - Diskretnaya Matematika PY - 2006 SP - 18 EP - 30 VL - 18 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DM_2006_18_4_a2/ LA - ru ID - DM_2006_18_4_a2 ER -