An attempt to resolve some difficulties regarding the tempo in the interpretation of the second movement of Beethoven's Piano Sonata in Cminor op. 111. Bulletin of Shobi-Gakuen Junior College. 1999. 14. 1
Fingerings and Notes on Interpretation for Piano Sonata Op. 26 by Beethoven (Wiener Urtext Edition). Beethoven, Piano Sonata Op.26. Wiener Urtext Edition(Vienna, Austria). 1994