@article{PDMA_2012_5_a6,
     author = {A. S. Kuznetsova and K. V. Safonov},
     title = {On a~combinatorial optimization problem},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {15--16},
     publisher = {mathdoc},
     number = {5},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2012_5_a6/}
}