TY - JOUR AU - E. G. D'yakonov TI - A new approach to the Dirichlet boundary conditions that is based on the use of strengthened Sobolev spaces JO - Differencialʹnye uravneniâ PY - 1998 SP - 1359 EP - 1368 VL - 34 IS - 10 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1998_34_10_a9/ LA - ru ID - DE_1998_34_10_a9 ER -