Horst Koegler, Internet Archive: The Concise Oxford dictionary of ballet. London ; New York : Oxford University Press, 1977, ISBN 978-0-19-311314-5, S.300 (archive.org).
John Engstead: Nina Novak, Ballet Russe de Monte Carlo, U.S., c. 1949. In: Valrene Tweedie Collection of Dance Photographs from the Ballets Russes. 1949 (gov.au).