source:Source: http://fac.umc.edu.dz/snv/faculte/biblio/mmf/2017/Etude%20r%C3%A9trospective%20sur%20les%20tumeurs%20neuroendocrines%20digestives%20dans%20la%20r%C3%A9gion%20de%20Constantine%20%20aspects%20%C3%A9pid%C3%A9miologiques%20et%20anatomopathologiques.pdf
