@article{DA_2006_13_2_a3,
     author = {V. V. Servakh},
     title = {A polynomially solvable case of the three-stage {Johnson} problem},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {44--55},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2006_13_2_a3/}
}