THE CONTRIBUTION OF THE MILITARY SCHOOL TO THE BUILDING OF THE NATIONAL SECURITY SYSTEM OF BULGARIA IN THE PERIOD 1878-1885. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 4, p. 155–159, 2024. DOI: 10.17770/etr2024vol4.8231. Disponível em: https://archive-journals.rtu.lv/etr/article/view/5083.. Acesso em: 11 mar. 2026.