@article{MM_1996_8_1_a4,
     author = {N. I. Ionkin and E. A. Valikova},
     title = {On eigenvalues and eigenfunctions of a~non-classical boundary value problem},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {53--63},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1996_8_1_a4/}
}