@BOOK{EHQ2011,
AUTHOR = {Thomas Eckart and Erla Hallsteinsdóttir and Uwe Quasthoff},
TITLE = {Frequency Dictionary German - Häufigkeitswörterbuch Deutsch},
PUBLISHER = {Uwe Quasthoff, Sabine Fiedler and Erla Hallsteindóttir (eds.). Leipziger Universitätsverlag},
YEAR = {2011}
}