@article{ZVMMF_1994_34_10_a0,
     author = {I. M. Prudnikov},
     title = {Differential properties of the extremum function with respect to a {Lipschitzian} many-valued mapping},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1347--1357},
     year = {1994},
     volume = {34},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1994_34_10_a0/}
}