TY - JOUR AU - V. L. Berdichevsky TI - Variational principles in the problem of averaging random structures JO - Doklady Akademii Nauk PY - 1981 SP - 301 EP - 304 VL - 261 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1981_261_2_a10/ LA - ru ID - DAN_1981_261_2_a10 ER -