Agrawal, G., S. Shevade, and S. Shrikhande. “Salmonella Typhi With Decreased Drug Resistance: Drug Resistance In Salmonella Typhi”. National Journal of Integrated Research in Medicine, vol. 4, no. 3, June 2013, p. 171, http://nicpd.ac.in/ojs-/index.php/njirm/article/view/546.