Ankudinov, I., M. Golovina, V. L’vov, N. Vaneeva, I. Verner, S. Yolkina, and P. Aparin. “Chromatographically Purified Vi-Capsular Polysaccharide Antigen for Vaccination Against Typhoid Fever”. Medical Journal of Indonesia, Vol. 7, no. Supp1, Oct. 1998, pp. 240-6, doi:10.13181/mji.v7iSupp1.1125.