%0 Journal Article %A E. G. D'yakonov %T A new approach to Dirichlet boundary conditions that is based on %J Doklady Akademii Nauk %D 1997 %P 590-594 %V 352 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1997_352_5_a2/ %G ru %F DAN_1997_352_5_a2