@article{DE_1972_8_12_a21,
     author = {V. N. Monakov},
     title = {A reduction principle for certain strongly nonlinear systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2255--2256},
     publisher = {mathdoc},
     volume = {8},
     number = {12},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_12_a21/}
}