@article{SM_1974_22_3_a5,
     author = {A. V. Babin},
     title = {Finite dimensionality of the kernel and cokernel of quasilinear elliptic mappings},
     journal = {Sbornik. Mathematics},
     pages = {427--455},
     year = {1974},
     volume = {22},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1974_22_3_a5/}
}