TY - JOUR AU - G. S. Makanin TI - Recognizing the rank of coefficientless equations in a free semigroup JO - Doklady Akademii Nauk PY - 1978 SP - 851 EP - 854 VL - 243 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1978_243_4_a7/ LA - ru ID - DAN_1978_243_4_a7 ER -