%0 Journal Article %A A. A. Polosin %T On the Location of the Spectrum of a Mixed Boundary Value Problem in a Square %J Differencialʹnye uravneniâ %D 2002 %P 1095-1100 %V 38 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2002_38_8_a10/ %G ru %F DE_2002_38_8_a10