@article{IIGUM_2010_3_3_a4,
     author = {L. T. Ashchepkov and E. A. Kolobov},
     title = {The problem of delivery},
     journal = {The Bulletin of Irkutsk State University. Series Mathematics},
     pages = {51--58},
     publisher = {mathdoc},
     volume = {3},
     number = {3},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIGUM_2010_3_3_a4/}
}