Reinauer, S, G Goerz, T Ruzicka, F Susanto, S Humfeld, and H Reinauer. 1994. “Helicobacter Pylori in Patients With Systemic Sclerosis: Detection With the 13C-Urea Breath Test and Eradication”. Acta Dermato-Venereologica 74 (5):361-63. https://doi.org/10.2340/0001555574364367.