Rigopoulos, Dimitris, D. Ioannides, N. Prastitis, and Andreas Katsambas. 2002. “Nail Psoriasis: A Combined Treatment Using Calcipotriol Cream and Clobetasol Propionate Cream”. Acta Dermato-Venereologica 82 (2):140. https://doi.org/10.1080/00015550252948220.