Nieradko-Iwanicka, Barbara, Katarzyna Chrobok, Justyna Skolarczyk, and Joanna Pekar. 2018. “What Is the PH, Fe and Cl2 Content of Cosmetics We Use? – a Pilot Study on Safety of Skin Care Products”. Polish Journal of Public Health 127 (2): 78-81. https://doi.org/10.1515/pjph-2017-0017.