TY - JOUR AU - L. L. Maksimova TI - Beth properties, interpolation and amalgamation in varieties of JO - Doklady Akademii Nauk PY - 1991 SP - 1309 EP - 1312 VL - 319 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1991_319_6_a5/ LA - ru ID - DAN_1991_319_6_a5 ER -