Murasmita, A. et al. (2023) “Differences in Facial Skin Acidity Levels of Nurses in Sebelas Maret University Hospital, Before and After Surgical Mask Use During the COVID-19 Pandemic ”, Bioscientia Medicina : Journal of Biomedicine and Translational Research, 7(12), pp. 3851–3854. doi:10.37275/bsm.v7i12.897.