K. A. Meeuwis, J. A. de Hullu, L. F. Massuger, P. C. van de Kerkhof, and M. M. van Rossum, “Genital Psoriasis: A Systematic Literature Review on this Hidden Skin Disease”, Acta Derm Venereol, vol. 91, no. 1, pp. 5–11, Oct. 2010.