@article{PDM_2013_4_a4,
     author = {A. V. Gavrikov},
     title = {T-irreducible extension of unions of some types orgraphs},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {47--55},
     publisher = {mathdoc},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2013_4_a4/}
}