Original: Piano Sonata, Op. 1. NX.PSC1021. Fantasies O. Piano sheet music. Piano Sonata, Op. 1. Fantasies O by Eva Knardahl. 1833-1897.
Oversettelse: Piano Sonata, Op 1. Piano noter. Piano Sonata, Op 1. Av Johannes Brahms. Lytte CD. Publisert av Simax Classics. ISBN 7025560010217.