@article{DE_2001_37_4_a13,
     author = {\={I}. \={I}. Lazurchak},
     title = {A {Two-Sided} {Method} for the {First} {Boundary} {Value} {Problem} for {Singular} {Ordinary} {Differential} {Equations}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {547--557},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2001_37_4_a13/}
}