T. Buhl, U. Krüger, S. Emmert, H. Peter Bertsch, and R. Mössner, “Photosensitive Psoriasis Vulgaris Inducible by a Single Suberythematous Dose of Ultraviolet B Irradiation”, Acta Derm Venereol, vol. 88, no. 4, pp. 414–416, Apr. 2008.