%0 Journal Article %A B. T. Bilalov %A T. B. Gasymov %T On basicity of eigenfunctions of second order discontinuous differential operator %J Ufa mathematical journal %D 2017 %P 109-122 %V 9 %N 1 %U http://geodesic.mathdoc.fr/item/UFA_2017_9_1_a9/ %G en %F UFA_2017_9_1_a9