Original: Piano Sonata, Op. 1. NX.PSC1021. Fantasies O. Piano sheet music. Piano Sonata, Op. 1. Fantasies O by Eva Knardahl. 1833-1897.
Translation: Piano Sonata, Op 1. Piano Sonata, Op 1. By Johannes Brahms. Listening CD. Published by Simax Classics. ISBN 7025560010217.