Druziuk, R., and O. Denefil. “Changes of Electrocardiograms of Animals With Epinephrine Heart Damage in Influences of Stress and Castration”. Journal of Education, Health and Sport 14, no. 1 (March 5, 2023): 50–58. Accessed July 21, 2024. https://apcz.umk.pl/JEHS/article/view/43146.