%0 Journal Article %A Yu. V. Shamardin %T On a~two-level location problem with constraints on the volume of production %J Diskretnyj analiz i issledovanie operacij %D 2000 %P 114-118 %V 7 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DA_2000_7_2_a9/ %G ru %F DA_2000_7_2_a9