@article{MMO_1967_16_a10,
     author = {E. M. Landis},
     title = {A new proof of {E.} {De~Giorgi's} theorem},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {319--328},
     year = {1967},
     volume = {16},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1967_16_a10/}
}