Hasan Maziz, M. N. “Detection and Molecular Characterization of Verotoxin in Enteropathogenic Escherichia Coli and Non-O157 Diarrheagenic Escherichia Coli”. Malaysian Journal of Science, vol. 24, no. 1, June 2005, p. 86, http://mojes.um.edu.my/index.php/MJS/article/view/17171.