@article{SVMO_2017_19_2_a8,
     author = {D. V. sirotkin},
     title = {Theorems of existence and sufficiency connected with local transformations of graphs for the $k$-colourability problem},
     journal = {\v{Z}urnal Srednevol\v{z}skogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {98--104},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SVMO_2017_19_2_a8/}
}