@article{ZVMMF_2009_49_9_a3,
     author = {D. G. Pivovarchuk},
     title = {A~criterion for checking if a~convex set belongs to the union of a~finite number of convex sets},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1571--1578},
     publisher = {mathdoc},
     volume = {49},
     number = {9},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_9_a3/}
}