@article{ZNSL_1983_124_a4,
     author = {K. V. Shakhbazyan},
     title = {On two sequencing problems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {44--72},
     publisher = {mathdoc},
     volume = {124},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1983_124_a4/}
}