@article{DE_1976_12_4_a9,
     author = {Yu. A. Ryabov and D. K. Lika},
     title = {A convergent iteration method for constructing solutions to systems in standard form},
     journal = {Differencialʹnye uravneni\^a},
     pages = {658--667},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_4_a9/}
}