TY - JOUR AU - V. I. Gryn' TI - Variational principles for the transport equation and the method of spherical harmonics JO - Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki PY - 1986 SP - 1433 EP - 1434 VL - 26 IS - 9 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZVMMF_1986_26_9_a18/ LA - ru ID - ZVMMF_1986_26_9_a18 ER -