%0 Journal Article %A Kh. K. Ishkin %A Kh. Kh. Murtazin %T Asymptotics for the eigenvalues of a~fourth order differential operator in a~``degenerate'' case %J Ufa mathematical journal %D 2016 %P 79-94 %V 8 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UFA_2016_8_3_a7/ %G en %F UFA_2016_8_3_a7