@article{ZVMMF_1978_18_2_a9,
     author = {K. Balla},
     title = {Error estimates in the substitution of the boundedness condition of the solutions for systems of linear ordinary differential equations with a regular singulari},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {370--378},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1978_18_2_a9/}
}