Jańczyk, Magdalena, et al. “Myocardial Blood Flow Assessment With Myocardial Perfusion Scan in Patients With Coronary Artery Chronic Total Occlusion”. Journal of Education, Health and Sport, vol. 10, no. 6, June 2020, pp. 275-8, doi:10.12775/JEHS.2020.10.06.030.