Surya, Maryati, et al. “Development of Tupaia Javanica Immortal Hepatocytes Culture for Javan Gibbon Hepatitis B Virus Replication”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 28, no. 1, June 2016, pp. 44-52, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/5892.