RYČKOV, Andrej. Internal and External Structure of Ruthenian Letters in Early Modern Lithuania. Lietuvos istorijos studijos, [S. l.], v. 44, p. 31–46, 2019. DOI: 10.15388/LIS.2019.44.2. Disponível em: https://www.journals.vu.lt/lietuvos-istorijos-studijos/article/view/15926.. Acesso em: 28 apr. 2024.