TY - JOUR AU - N. N. Kuzyurin TI - Minimal coverings and maximal packings of $(k-1)$-subsets by $k$-subsets JO - Matematičeskie zametki PY - 1977 SP - 565 EP - 571 VL - 21 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1977_21_4_a14/ LA - ru ID - MZM_1977_21_4_a14 ER -