C, SUNITA S, et al. “Improved Immunogenicity and Protection Against Enterotoxaemia in Sheep by Saponin and Aluminium Hydroxide Gel Co-Adjuvanted Vaccine”. The Indian Journal of Animal Sciences, vol. 83, no. 10, Oct. 2013, https://epubs.icar.org.in/index.php/IJAnS/article/view/33844.