Zlotogorski A (1987). "Distribution of skin surface pH on the forehead and cheek of adults". Arch. Dermatol. Res.279 (6): 398–401. doi:10.1007/bf00412626. பப்மெட்:3674963.
Zlotogorski A (1987). "Distribution of skin surface pH on the forehead and cheek of adults". Arch. Dermatol. Res.279 (6): 398–401. doi:10.1007/bf00412626. பப்மெட்:3674963.