2014, Folk pharmaceutical formulations in western Mediterranean: identification and safety of clays used in pelotherapy

Sánchez-Espejo R, Aguzzi C, Cerezo P, Salcedo I, López-Galindo A, Viseras C

J Ethnopharmacol. 2014 Aug 8;155(1):810-4. doi: 10.1016/j.jep.2014.06.031. Epub 2014 Jun 21

https://www.ncbi.nlm.nih.gov/pubmed/24960182