TY - JOUR AU - V. I. Paasonen TI - The improved boundary conditions at the singular points of coordinate systems for non-stationary boundary value problems JO - Sibirskij žurnal vyčislitelʹnoj matematiki PY - 1999 SP - 373 EP - 384 VL - 2 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SJVM_1999_2_4_a6/ LA - ru ID - SJVM_1999_2_4_a6 ER -