@article{ZVMMF_1962_2_6_a17,
     author = {I. Natanson},
     title = {J.~L.~Walsh. {A.} rigorous treatment of maximum-minimum problems in the},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1145},
     year = {1962},
     volume = {2},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1962_2_6_a17/}
}