TY - JOUR AU - E. E. Marenich TI - The singularity of some relations and their combinatorial applications JO - Diskretnaya Matematika PY - 1996 SP - 63 EP - 88 VL - 8 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DM_1996_8_2_a4/ LA - ru ID - DM_1996_8_2_a4 ER -