KRĪGERE, Zigrīda. Vocal longevity phenomenon of the Latvian National opera soloist Karlis Zarins. ARTS AND MUSIC IN CULTURAL DISCOURSE. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, p. 127–137, 2014. DOI: 10.17770/amcd2014.1333. Disponível em: https://journals.ru.lv/index.php/AMCD/article/view/1333.. Acesso em: 24 jun. 2024.