@article{ZVMMF_1991_31_12_a9,
     author = {A. A. Sapozhenko},
     title = {The search of a maximum upper zero of a monotone function on ranked sets},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1871--1884},
     year = {1991},
     volume = {31},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1991_31_12_a9/}
}