WARACZEWSKI, Maciej. The use of the auxiliary verb in 2nd person singular perfect verbal forms in Old Russian documents of the 14–16th centuries. Studia Rossica Posnaniensia, [S. l.], v. 45, n. 2, p. 235–242, 2020. DOI: 10.14746/strp.2020.45.2.18. Disponível em: https://pressto.amu.edu.pl/index.php/strp/article/view/25124. Acesso em: 20 kwi. 2024.