S. Gianfaldoni, R. Gianfaldoni, U. Wollina, J. Lotti, G. Tchernev, and T. Lotti, “An Overview on Radiotherapy: From Its History to Its Current Applications in Dermatology”, Open Access Maced J Med Sci, vol. 5, no. 4, pp. 521–525, Jul. 2017.