2003, Evaluation oft he permeation of peat substances through human skin in vitro.

Beer AM, Junginger HE, Lukanov J & Sagorchev P.

Int. J. Pharm. 2003;253,:169-175. doi: 10.1016/S0378-5173(02)00706-8.

https://pubmed.ncbi.nlm.nih.gov/12593947/