@article{DE_1979_15_5_a6,
     author = {I. \`El'shner},
     title = {A difference method for degenerate ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {828--839},
     publisher = {mathdoc},
     volume = {15},
     number = {5},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_5_a6/}
}