六十四分音符
Burrowes, John Freckleton. 1874. Burrowes' Piano-forte Primer: Containing the Rudiments of Music Adapted for Either Private Tuition Or Teaching in Classes Together with a Guide to Practice, new edition, revised and modernized, with important additions, by L.H. Southard. Boston and New York: Oliver Ditson.
Gerou, Tom, and Linda Lusk. 1996. Essential Dictionary of Music Notation. Los Angeles: Alfred Pub. Co. ISBN 978-0-88284-730-6
Haas, David. 2011. "Shostakovich’s Second Piano Sonata: A Composition Recital in Three Styles". In The Cambridge Companion to Shostakovich, edited by Pauline Fairclough and David Fanning, 95–114.