Cauia Alexandr, and Zacon Corina. “Private Military and Security Companies in the United States - Evolution, Legal Regulation and Perspectives”. Global Journal of Human-Social Science 21, no. A15 (December 15, 2021): 1–7. Accessed January 15, 2025. https://socialscienceresearch.org/index.php/GJHSS/article/view/3921.