LILOV, L. On the investigations of Kiril Popoff in the field of ballistics (in Bulgarian). Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 98, p. 11–23, 2008. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/125. Acesso em: 22 nov. 2024.