Virmani, Sumit, et al. “A Comparative Study on the Efficacy of Competitive Exclusion and Immunoprophylaxis With Salmonella Gallinarum (rough Strain) in Chicks”. The Indian Journal of Animal Sciences, vol. 75, no. 4, Apr. 2005, https://epubs.icar.org.in/index.php/IJAnS/article/view/9473.