“ Anticancer Activityof Alkaloids of Madagascar Periwinkle Catharanthusroseus (L.)G.Don Against Two Cancer Cell Line ”. University of Thi-Qar Journal of Science, vol. 3, no. 1, July 2011, pp. 40-47, http://mail.jsci.utq.edu.iq/index.php/main/article/view/228.