@article{ZVMMF_1999_39_7_a5,
     author = {E. P. Zhidkov and A. G. Solov'\"ev},
     title = {Improving the accuracy of eigenvalues and eigenfunctions of a boundary value problem on semiaxis},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1098--1118},
     publisher = {mathdoc},
     volume = {39},
     number = {7},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1999_39_7_a5/}
}