@article{ZNSL_2010_378_a0,
     author = {A. M. Vershik},
     title = {Nonfree actions of countable groups and their characters},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {5--16},
     year = {2010},
     volume = {378},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2010_378_a0/}
}