@article{ZVMMF_2009_49_6_a8,
     author = {I. L. Vasiliev and K. B. Klimentova and Yu. A. Kochetov},
     title = {New lower bounds for the facility location problem with clients' preferences},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1055--1066},
     year = {2009},
     volume = {49},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2009_49_6_a8/}
}