Kanra, G, et al. “Safety, Tolerability and Immunogenicity of a Haemophilus Influenzae Type B Vaccine Containing Aluminum Phosphate Adjuvant Administered at 2, 3 and 4 Months of Age”. The Turkish Journal of Pediatrics, vol. 41, no. 4, Oct. 1999, pp. 421-7, https://turkjpediatr.org/article/view/3256.