@article{MM_1989_1_12_a5,
     author = {S. P. Litvintseva and I. D. Rodionov and E. B. Solomatin},
     title = {Method of parameter evolution in spectral problems of mathematical physics},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {52--81},
     publisher = {mathdoc},
     volume = {1},
     number = {12},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1989_1_12_a5/}
}