ABDELKADER ABOU AZOOM, A., K. ZHANI, and C. HANNACHI. “Performance of Eight Varieties of Onion (Allium Cepa L.) Cultivated under Open Field in Tunisia”. Notulae Scientia Biologicae, vol. 6, no. 2, June 2014, pp. 220-4, doi:10.15835/nsb629287.