@article{MAT_1959_3_3_a1,
     author = {L. Nirenberg},
     title = {On nonlinear elliptic partial differential equations and {H\"older} continuity},
     journal = {Matematika},
     pages = {9--56},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {1959},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1959_3_3_a1/}
}