Rumen Sirakov – the Master of the “Poor Piano”. The Performing Technique of Rumen Sirakov. Klironomy, [S. l.], n. 3, p. 91–107, 2021. DOI: 10.47451/art2021-10-001. Disponível em: https://journals.eiid.eu/index.php/kj/article/view/71. Acesso em: 31 jul. 2025.