Novhorodska, L. O., S. V. Parakhin, R. G. Shaban, and E. V. Luchuk. “Estimation of Indexes Variating of Aerotechnics Reliability at Times of Exploitation”. Military Technical Collection, no. 3 (June 7, 2010): 86–89. Accessed March 9, 2022. http://vtz.asv.gov.ua/article/view/175664.