Martynova, Natalya. 2019. “Some Aspects of Upgrading the Sound of a Piano in the Era of Musical Radicalism of T He Early Twentieth Century.”. Scientific Collections of the Lviv National Music Academy Named After MV Lysenko, no. 45 (December), 182-98. https://doi.org/10.33398/2310-0583.2019.45.182.198.