Maharjan, Anil, et al. “Evaluation of an Enzyme Immunoassay and TPPA for Detection of Antibodies Against Treponema Palladium”. Journal of Nepal Health Research Council, vol. 5, no. 2, Dec. 2009, pp. 1-4, https://www.nepjol.info/index.php/JNHRC/article/view/2449.