@article{ZNSL_2002_292_a9,
     author = {P. V. Yagodovskii},
     title = {Bicoset groups and symmetric graphs},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {161--174},
     year = {2002},
     volume = {292},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2002_292_a9/}
}