@article{ZVMMF_1992_32_1_a1,
     author = {D. S. Dzhumabaev},
     title = {Singular boundary-value problems and their approximation for nonlinear ordinary differential equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {13--29},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1992_32_1_a1/}
}