Presburger Ulniković, Vladanka, et al. “Premature Deaths Due to Exposure to PM2.5 in Belgrade before and at the Beginning of the COVID-19 Pandemic”. Global Sustainability Challenges, vol. 2, no. 1, Dec. 2024, pp. 19-26, https://gsc.unionnikolatesla.edu.rs/index.php/gsc/article/view/4.