%0 Journal Article %A D. K. Potapov %T Estimation of the bifurcation parameter in spectral problems for equations with discontinuous operators %J Ufa mathematical journal %D 2011 %P 42-44 %V 3 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/UFA_2011_3_1_a3/ %G en %F UFA_2011_3_1_a3