Gani, R. A., Handayu, A. D., Mulatsih, R., Lesmana, L. A., Sulaiman, A. and Akbar, N. (2005) “Genotyping of hepatitis B virus from dried and stored serum on filter paper”, Medical Journal of Indonesia, 14(4), pp. 215–219. doi: 10.13181/mji.v14i4.198.