@article{UFA_2016_8_3_a7,
     author = {Kh. K. Ishkin and Kh. Kh. Murtazin},
     title = {Asymptotics for the eigenvalues of a~fourth order differential operator in a~``degenerate'' case},
     journal = {Ufa mathematical journal},
     pages = {79--94},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2016_8_3_a7/}
}