Evaluation of the permeation of peat substances through human skin in vitro

André-M.Beerac, H.E.Junginger, J.Lukanov, P.Sagorchevcd
International Journal of Pharmaceutics
Volume 253, Issues 1–2, 6 March 2003, Pages 169-175

https://www.sciencedirect.com/science/article/pii/S0378517302007068