@article{DAN_1987_292_3_a14,
     author = {E. V. Zakharov and Yu. M. Koptelov},
     title = {Solution of a problem of mathematical processing of},
     journal = {Doklady Akademii Nauk},
     pages = {576--581},
     publisher = {mathdoc},
     volume = {292},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_3_a14/}
}