Ali, L. G. A., A. T. M. A. Fadul, and M. A. M. Taha. “Topical Olive Oil and Narrow Band Ultraviolet-B Trial for Segmental Vitiligo Among Adult Sudanese Patients in Khartoum State, Sudan 2018”. International Journal of Research in Dermatology, vol. 5, no. 4, Oct. 2019, pp. 808-11, doi:10.18203/issn.2455-4529.IntJResDermatol20194672.