Ochulor, E. F., A. S. O. Ekeleme, J. U, and U. J. O. Nnaji, R. N. “CARBIDE CHARACTERIZATION IN SINGLE AND DOUBLE STEP INOCULATED THIN WALL DUCTILE IRON”. UNILAG Journal of Medicine, Science and Technology, Vol. 6, no. 1, May 2019, pp. 15-32, http://ujmst.unilag.edu.ng/article/view/361.