Sapielkin, Victor. “Using the Method of Principal Components in Study of the Data Obtained by Means of X-Ray Fluorescent Spectral Analysis on the Elemental Composition of Clothing Damages Areas at the Shooting of Nonlethal Elastic Bullets ‘Teren-12P’ Ammunition”. Journal of Education, Health and Sport 9, no. 1 (January 31, 2019): 326–334. Accessed June 28, 2025. https://apcz.umk.pl/JEHS/article/view/6561.