Легостаєва К. FORMATION OF PERFORMANCE COMPETENCIES OF PIANIST STUDENTS IN THE PROCESS OF WORKING ON POLYPHONIC WORKS. SWJ [Internet]. 2022Jan.30 [cited 2024May6];6(11-06):69-71. Available from: https://www.sworldjournal.com/index.php/swj/article/view/swj11-06-119