ALGIN, Sergei. Free – bass accordion in modern educational systems. ARTS AND MUSIC IN CULTURAL DISCOURSE. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, p. 69–78, 2012. DOI: 10.17770/amcd2012.1241. Disponível em: https://journals.ru.lv/index.php/AMCD/article/view/1241.. Acesso em: 9 may. 2024.