@article{TIMM_2011_17_4_a28,
     author = {V. I. Trofimov},
     title = {Symmetrical extensions of graphs and some other topics in graph theory related with group theory},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {316--320},
     publisher = {mathdoc},
     volume = {17},
     number = {4},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2011_17_4_a28/}
}