Faik, Ashna J., et al. “Molecular Epidemiology Analysis of Salmonella Enterica Serotype Typhi Used Pulsed-Field Gel Electrophoresis (PFGE)”. Journal of Biotechnology Research Center (JOBRC), vol. 8, no. 2, June 2014, pp. 49-59, doi:10.24126/jobrc.2014.8.2.330.