Hrigoriev, O. M., Z. V. Bilyk, O. V. Sakun, and V. V. Maruschenko. “Precision Method of Direction-Finding on the Point Gamma-Source”. Military Technical Collection, no. 7 (November 9, 2012): 25–28. Accessed March 9, 2022. http://vtz.asv.gov.ua/article/view/163959.