Al-Zuhairi, Ekhlas, AND 		Ghanm, Nadhm.
" Effect of BA, NAA, Methyl Jasmonate and Mannitol on Callus Induction of Periwinkle Plant (Catharanthus roseus L. cv. Heatwave Mix) by In Vitro Culture" <em>Tikrit Journal for Agricultural Sciences مجلة تكريت للعلوم الزراعية</em> [Online], Volume 18 Number 4 (16 March 2019)