@article{DE_1970_6_2_a15,
     author = {V. P. Rudakov},
     title = {A bilateral estimate of the norms of the solutions of a certain class of nonlinear systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {371--372},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_2_a15/}
}