Reis, J., A. Machado, A. Coelho, V. Costa, and M. Selores. “Topical Photodynamic Therapy As a Treatment Option for Periocular Bowen’s Disease: A Case Report”. Journal of the Portuguese Society of Dermatology and Venereology, Vol. 79, no. 4, Dec. 2021, pp. 377-9, doi:10.29021/spdv.79.4.1397.