%0 Journal Article %A V. V. Servakh %T A polynomially solvable case of the three-stage Johnson problem %J Diskretnyj analiz i issledovanie operacij %D 2006 %P 44-55 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DA_2006_13_2_a3/ %G ru %F DA_2006_13_2_a3