@BOOK{SGQ17,
AUTHOR = {Serge Sharoff, Dirk Goldhahn and Uwe Quasthoff},
TITLE = {Frequency Dictionary Russian - Частотный словарь русского языка},
PUBLISHER = {Uwe Quasthoff, Sabine Fiedler and Erla Hallsteindóttir (eds.). Leipziger Universitätsverlag},
YEAR = {2017}
}