N. Leung, C.Y. Peng, H.W. Hann, J. Sollano i inni. Early hepatitis B virus DNA reduction in hepatitis B e antigen-positive patients with chronic hepatitis B: A randomized international study of entecavir versus adefovir. „Hepatology”. 49 (1), s. 72-79, Jan 2009. DOI: 10.1002/hep.22658. PMID: 19065670.
N. Leung, C.Y. Peng, H.W. Hann, J. Sollano i inni. Early hepatitis B virus DNA reduction in hepatitis B e antigen-positive patients with chronic hepatitis B: A randomized international study of entecavir versus adefovir. „Hepatology”. 49 (1), s. 72-79, Jan 2009. DOI: 10.1002/hep.22658. PMID: 19065670.