@article{ZVMMF_1965_5_6_a1,
     author = {E. S. Birger and N. B. Lyalikova},
     title = {Discovery of the solutions of certain systems of differential equations with a given condition at {infinity.~I}},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {979--990},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1965_5_6_a1/}
}