Gujarathi, R. H. “A Critical Evaluation of Whole Cell Pertussis Vaccines on Their Composition and Efficacy in Comparison to Acellular Pertussis Vaccines”. Asian Journal of Clinical Pediatrics and Neonatology, Vol. 5, no. 4, Sept. 2017, pp. 9-14, https://aijournals.com/index.php/ajcpn/article/view/216.