JAKUBOWSKA, Eliza, NOWAK, Tomasz, ŁAZICKA, Patrycja, JASIŃSKA, Joanna, MIZINIAK, Marta and KAROLAK, Aleksandra. The impact of using a protective mask on the occurrence of maskne (mask acne) during the Covid-19 pandemic. Journal of Education, Health and Sport. Online. 30 August 2023. Vol. 38, no. 1, pp. 166-184. [Accessed 17 July 2024]. DOI 10.12775/JEHS.2023.38.01.012.