@article{DM_2002_14_3_a2,
     author = {V. A. Kolmykov and V. V. Men'shikh},
     title = {On reversal of graph orientation},
     journal = {Diskretnaya Matematika},
     pages = {18--22},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2002_14_3_a2/}
}