@article{SM_1969_7_3_a1,
     author = {M. I. Freidlin},
     title = {Existence ``in the large'' of smooth solutions of degenerate quasilinear equations},
     journal = {Sbornik. Mathematics},
     pages = {323--339},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1969_7_3_a1/}
}