GOWTHAMI, Y., G. CHANDRASEHAR, and N. T. SATHYA. “Isolation of Agrobacterium Tumefaciens Strains from Stem Gall Disease on Manilkara Zapota Tree in Padappai, Tamil Nadu, India.”. Biotechnological Research, Vol. 1, no. 3, Dec. 2015, pp. 156-9, http://br.biomedpress.org/index.php/br/article/view/700.