@article{DA_2014_21_5_a4,
     author = {A. A. Panin and A. V. Plyasunov},
     title = {On complexity of bilevel problems of location and pricing},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {54--66},
     publisher = {mathdoc},
     volume = {21},
     number = {5},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2014_21_5_a4/}
}