Korchev, O. 2022. IDENTIFYING THE IDEA OF MODIFICATION AS A PROCESS OF CONTINUOUS TRANSFORMATION OF THE THEME IN THE PIANO CYCLE “METAMORPHOSIS” BY JOHN CAGE. Music art and culturе. 2, 32 (Jan. 2022), 90-102. DOI:https://doi.org/https://doi.org/10.31723/2524-0447-2021-32-2-8.