Ivanova Kremena, Stojanovska Zdenka, Kunovska Bistra, Djunakova Desislava, Djounova Jana, and Chobanova Nina. “Continuous Measurements of Radon and Radon Progeny in Various Public Places”. Journal of the European Radon Association 3 (October 21, 2022). Accessed February 7, 2023. https://radonjournal.net/index.php/radon/article/view/8805.