TY - JOUR AU - Yu. M. Vazhenin TI - The cardinalities of semigroups of isotonic transformations of reflexive graphs JO - Matematičeskie zametki PY - 1974 SP - 317 EP - 323 VL - 16 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1974_16_2_a15/ LA - ru ID - MZM_1974_16_2_a15 ER -