@article{ZVMMF_1998_38_11_a3,
     author = {D. S. Dzhumabaev},
     title = {Approximation estimates for singular boundary value problems for ordinary differential equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1814--1821},
     publisher = {mathdoc},
     volume = {38},
     number = {11},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1998_38_11_a3/}
}