Wollina, U., A. Nowak, G. Tchernev, and T. Lotti. “Chronic Scalp Ulcer 35 Years After Skull Trepanation Surgery and Radiotherapy for Oligodendroglioma: A Further Example of Immunocompromised Cutaneous Districts”. Open Access Macedonian Journal of Medical Sciences, vol. 6, no. 1, Dec. 2017, pp. 55-57, doi:10.3889/oamjms.2018.019.