Al-Saqaf ن. م. and Hussein م. ع., “Effect of (Glycyrrhizaglabra L.) extract and powder on productivity and quality of onion (Allium cepa L. cv. Bafatiem)”, Univ. Aden J. Nat. and Appl. Sc., vol. 22, no. 1, pp. 19–26, Apr. 2018.