Zink, A., E. Koch, F. Seifert, M. Rotter, C. . D. Spinner, and T. Biedermann. “Nonmelanoma Skin Cancer in Mountain Guides: High Prevalence and Lack of Awareness Warrant Development of Evidence-Based Prevention Tools”. Swiss Medical Weekly, vol. 146, no. 4950, Dec. 2016, p. w14380, doi:10.4414/smw.2016.14380.