KOVIN, V. S. Manipulation of the ballot papers in Russian electoral practice: efficiency or effectiveness? Subject for research. Perm Federal Research Centre Journal, [S. l.], n. 1, p. 39–54, 2019. DOI: 10.7242/2658-705X/2019.1.4. Disponível em: https://journal-dev.icmm.ru/index.php/pscj/article/view/PSCJ2019n1p4. Acesso em: 13 may. 2026.