@article{DA_2006_13_3_a5,
     author = {S. V. Sevast'yanov and D. A. Chemisova and I. D. Chernykh},
     title = {Some properties of optimal schedules for the {Johnson} problem with preemption},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {83--102},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2006_13_3_a5/}
}