@article{RM_1967_22_6_a10,
     author = {V. A. Kondrat'ev},
     title = {G.~Sansone and {R.~{\CYRS}{\cyro}nti,} {Non-linear} differential equations (review)},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {22},
     number = {6},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1967_22_6_a10/}
}