@article{PDMA_2015_8_a42,
     author = {Y. E. Avezova and V. M. Fomichev},
     title = {Primitiveness conditions for systems of two graphs},
     journal = {Prikladnaya Diskretnaya Matematika. Supplement},
     pages = {113--114},
     publisher = {mathdoc},
     number = {8},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDMA_2015_8_a42/}
}