GORDEEVA, T. Y., Z. R. AZHIMOV, R. R. MIRNAYA, and A. R. VOZNESENSKAYA. “ONTOLOGICAL AND AESTHETIC QUALITIES OF A SINGING SOUND”. Studia Universitatis Babeș-Bolyai Musica, vol. 64, no. 1, June 2019, pp. 67-84, doi:10.24193/subbmusica.2019.1.05.