L’vov, V.L, I.C. Verner, M.E. Golovina, and P.G. Aparin. “Immunobiological Characterization of Low Toxic &amp; Pyrogenic Lipopolysaccharide from <em>Salmonella typhi</Em&gt;”. Medical Journal of Indonesia 7, no. Supp1 (October 1, 1998): 247-51. Accessed April 20, 2024. http://mji.ui.ac.id/journal/index.php/mji/article/view/1126.