STAMBOULI-ESSASSI, S., M. ZAKRAOUI, S. BOUZID, and F. HARZALLAH-SKHIRI. “Sexual Propagation of the Tunisian Spinescent Opuntia Ficus-Indica (L.) Mill., Morphogenetic Deployment and Polymorphism”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, vol. 45, no. 1, June 2017, pp. 50-58, doi:10.15835/nbha45110600.