TY - JOUR AU - M. G. Kuz'mina TI - The perturbation method in problems of radiative transfer in flat JO - Doklady Akademii Nauk PY - 1989 SP - 335 EP - 339 VL - 308 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1989_308_2_a16/ LA - ru ID - DAN_1989_308_2_a16 ER -