%0 Journal Article %A D. K. Potapov %T Estimations of a Differential Operator in Spectral Parameter Problems for Elliptic Equations with Discontinuous Nonlinearities %J Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences %D 2010 %P 268-271 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/VSGTU_2010_5_a30/ %G ru %F VSGTU_2010_5_a30