Aekaputra, Supakorn. “Haydn’s Last Five Piano Sonatas: Their Influences on Beethoven’s Piano Sonatas”. Rangsit Music Journal 8, no. 2 (July 10, 2018): 1–17. accessed September 11, 2026. https://so06.tci-thaijo.org/index.php/rmj/article/view/127622.