Attia, S., N. Atwan, M. Arafa, and R. Shahin. “Expression of CD133 As a Cancer Stem Cell Marker in Invasive Gastric Carcinoma”. Pathologica - Journal of the Italian Society of Anatomic Pathology and Diagnostic Cytopathology, Vol. 111, no. 1, Mar. 2019, pp. 18-23, doi:10.32074/1591-951X-51-18.