Djurdjevic, D., Todorovic, J., Terzic-Supic, Z., & Piperac, P. (2022). Factors Associated with PA Level during the COVID-19 Outbreak in Serbia. Puerto Rico Health Sciences Journal, 41(2), 63–67. Retrieved from https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/2609