B. Tanurahardja, E. Soetrisno, S. Endardjo, G. Tjahjadi, and W. Marwoto, “Expression of HBsAg and HBcAg in liver biopsy specimens of chronic B hepatitis patients and its relation with histology activity index”, Med J Indones, vol. 5, no. 3, pp. 142-8, Jul. 1996.