Ksontini, Feryel, Fatma Guermazi, Meddeb Khadija, Mokrani Amina, Yahiaoui Yosra, Gabsi Azza, Rais Henda, Chraiet Nesrine, Ayadi Mouna, and Mezlini Amel. “Descriptive Epidemiology of Malignant Primary Osteosarcoma in Tunisia 1980-2016”. Asian Pacific Journal of Cancer Care 3, no. 4 (November 13, 2018): 81. Accessed July 11, 2020. http://waocp.com/journal/index.php/apjcc/article/view/28.