NESSET, T. Schwa in Contemporary Standard Russian. Poljarnyj vestnik, [S. l.], v. 3, p. 49–63, 2000. DOI: 10.7557/6.1417. Disponível em: https://septentrio.uit.no/index.php/vestnik/article/view/1417. Acesso em: 3 may. 2024.