@article{PDM_2011_4_a4,
     author = {M. B. Abrosimov},
     title = {On minimal vertex 1-extensions of special type graph union},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {34--41},
     publisher = {mathdoc},
     number = {4},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2011_4_a4/}
}