Mlyneková, E., M. Halo, B. Gálik, and I. Imrich. “THE ANALYSIS OF HEART FREQUENCY OF HORSES UNDER LOAD”. Journal of Microbiology, Biotechnology and Food Sciences, vol. 2, no. special issue 2, Feb. 2013, pp. 1502-9, https://office2.jmbfs.org/index.php/JMBFS/article/view/7480.