%0 Journal Article %A R. R. Gadyl'shin %T On the perturbation of the Laplacian spectrum when the boundary condition type changes on a small part of the boundary %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1996 %P 77-88 %V 36 %N 7 %U http://geodesic.mathdoc.fr/item/ZVMMF_1996_36_7_a6/ %G ru %F ZVMMF_1996_36_7_a6