U. Wollina, C. Krönert, A. Koch, J. Schönlebe, A. Vojvodic, and T. Lotti, “Erythema Elevatum Diutinum - Two Case Reports, Two Different Clinical Presentations, and a Short Literature Review”, Open Access Maced J Med Sci, vol. 7, no. 18, pp. 3039–3042, Aug. 2019.