Portnoy, B, and MH Beck. “The Treatment of Active Chronic Psoriasis: A Comparison of the Effectiveness of a Preparation Containing 0.1% Dithranol and 17% Urea in a Cream Base and 0.1% Dithranol in Lassar´s past B.P.C”. Acta Dermato-Venereologica 61, no. 5 (September 1, 1981): 459–461. Accessed June 21, 2026. https://medicaljournalssweden.se/actadv/article/view/10536.