Original: Piano Sonata No. 29, Op. 39. Piano Sonata No. 29, Op. 39 by Baekkelund. By Geirr Tveitt. Piano sheet music. Osa.
Translation: Bergen Philharmonic Orchestra. Andersen. 1908-1981. Listening CD. Published by Aurora. NX.NCDB4945. ISBN 7044581349458.
