Skurko, Evgeniya R. “The Theory of Variant Form in Russian Musicology: The Stages of Formation, the Conceptual Framework”. Music Scholarship / Problemy Muzykal’noj Nauki, no. 1 (March 25, 2019): 46–54. Accessed July 3, 2024. https://musicscholar.ru/index.php/PMN/article/view/1012.