@article{MZM_1986_40_5_a4,
     author = {N. B. Kerimov},
     title = {Some properties of the eigenfunctions and associated functions of an ordinary differential operator of fourth order},
     journal = {Matemati\v{c}eskie zametki},
     pages = {608--620},
     publisher = {mathdoc},
     volume = {40},
     number = {5},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1986_40_5_a4/}
}