@article{ZVMMF_1965_5_3_a8,
     author = {A. D. Myshkis},
     title = {On depressions},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {537--542},
     year = {1965},
     volume = {5},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1965_5_3_a8/}
}