Die Kur - Kraft für Körper, Seele und den Alltag

2007, Minerals and clay minerals in medical geology

Celso de Sousa, Figueire, GomesJoão Baptista, Pereir Silva

Applied Clay Science, Volume 36, Issues 1–3, April 2007, Pages 4-21

https://www.sciencedirect.com/science/article/abs/pii/S0169131706001426