TY - JOUR AU - R. G. Nigmatullin TI - Two classes of proofs of lower bounds on complexity JO - Doklady Akademii Nauk PY - 1987 SP - 272 EP - 275 VL - 294 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1987_294_2_a2/ LA - ru ID - DAN_1987_294_2_a2 ER -