@article{ZNSL_2013_415_a12,
     author = {V. M. Nezhinskij and Yu. V. Maslova},
     title = {Graphs with framed vertices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {103--108},
     publisher = {mathdoc},
     volume = {415},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2013_415_a12/}
}