@article{IIMI_2006_3_a74,
     author = {A. G. Chentsov},
     title = {Extreme problems of routing with restrictions},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {163--166},
     year = {2006},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2006_3_a74/}
}