Hashimoto-Kumasaka, K, K Takahashi, and H Tagami. 1993. “Electrical Measurement of the Water Content of the Stratum Corneum in Vivo and in Vitro under Various Conditions: Comparison Between Skin Surface Hygrometer and Corneometer in Evaluation of the Skin Surface Hydration State”. Acta Dermato-Venereologica 73 (5):335-39. https://doi.org/10.2340/0001555573335339.