Ankudinov, I., Golovina, M., L’vov, V., Vaneeva, N., Verner, I., Yolkina, S. and Aparin, P. (1998) “Chromatographically purified Vi-capsular polysaccharide antigen for vaccination against Typhoid fever”, Medical Journal of Indonesia, 7(Supp1), pp. 240-6. doi: 10.13181/mji.v7iSupp1.1125.