%0 Journal Article %A I. E. Pleshchinskaya %A N. B. Pleschinskii %T Over-determined boundary value problems for elliptic partial differential equations and their applications to waves diffraction theory. %J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki %D 2005 %P 4-32 %V 147 %N 3 %U http://geodesic.mathdoc.fr/item/UZKU_2005_147_3_a0/ %G ru %F UZKU_2005_147_3_a0