VOYUSH, Inha D. Protoforms of information and communication activities during the reign of Vytautas (the second  half of the XIV – early XV century). Journal of the Belarusian State University. Journalism, [S. l.], n. 1, p. 4–13, 2019. Disponível em: https://journals.bsu.by/index.php/journalism/article/view/2329. Acesso em: 18 jul. 2026.