@article{PDM_2013_3_a8,
     author = {A. R. Urakov and T. V. Timeryaev},
     title = {Two problems of weighted graphs approximation and their solution algorithms},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {86--92},
     publisher = {mathdoc},
     number = {3},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2013_3_a8/}
}