NESSET, T. Chapter 12. Phonology: From Old Rusian to Modern Russian. Septentrio Educational, [S. l.], n. 1, 2015. DOI: 10.7557/8.3502. Disponível em: https://septentrio.uit.no/index.php/SapEdu/article/view/3502. Acesso em: 1 may. 2024.