Galibert, F., Mandart, E., Tiollais, P. and Charnay, P. (1979). Nucleotide sequence of the hepatitis B virus genome (subtype ayw) cloned in E. coli. Nature, 281, 646-650.

Ganem, D. (1996). “Hepadnaviridae and their replication” In: Fields, B.N. et al. (eds). “Virology” 3rd edn. Lippincott-Raven, Philadelphia, pp. 2703-2737.

Gust, I.D., Burrell, C.J., Coulepis, A.G., Robinson, W.S. and Zuckerman, A.J. (1986). Taxonomic classification of human hepatitis B virus. Intervirology, 25, 14-29.

Hollinger, F.B. (1996). “Hepatitis B Virus” In: Fields, B.N., et al. (eds). “Virology” 3rd edn. Lippincott-Raven Philadelphia, pp 2739-2807.

Howard, C. and Melnick, J.L.,. (1991). “Classification and taxonomy of hepatitis viruses”. In: Hollinger, F.B., Lemon, S., Margolis, H.S., (eds). “Viral hepatitis and liver disease”. Williams and Baltimore, pp 890-892.

Kann, M. and Gerlich, W.H. (1998). “Hepatitis B” In: Collier, L., Balows, A., Sussman, M (eds). “Topley and Wilson’s Microbiology and Microbial Infections” 9th edn. Arnold, London, Vol. 1, pp 745-774.

Nassal, M., and Schaller, H. (1996). Hepatitis B virus replication-an update. J. Virol. Hepatitis, 3, 217-226.

Nassal, M. (1996). Hepatitis B virus morphogenesis. Curr. Top. Microb. Immun., 214, 297-337.

Netter, H.J., Chassot, S., Chang, S.F., Cova, L. and Will, H. (1997). Sequence heterogeneity of heron hepatitis B virus genomes determined by full-length DNA amplification and direct sequencing reveals novel and unique features. J. Gen. Virol., 78, 1707-1718.

Norder, H., Hammas, B., Lee, S.D., Bile, K., Courouce, A.M., Mushahwar, I.K. and Magnius, L.O. (1993). Genetic relatedness of hepatitis B viral strains of diverse geographical origin and natural variations in the primary structure of the surface antigen. J. Gen. Virol., 74, 1341-1348.

Schodel, F., Sprengel, R., Weimer, T., Fernholz, D., Schneider, R. and Will, H. (1989). Animal hepatitis B viruses. Adv. Viral. Oncol., 8, 73-108.

Summers, J. and Mason, W.S. (1982). Replication of the genome of a hepatitis B-like virus by reverse transcription of an RNA intermediate. Cell, 29, 403-415.

Testut, P., Renard, C.A., Terradillas, O., Vilvitski-Trepro, L., Tekaia, F., Degott, C., Blake, J., Boyer, B. and Buendia, M.A. (1996). A new hepadnavirus endemic in arctic ground squirrels in Alaska. J. Virol., 70, 4210-4219.

Tiollais, P., Pourcel, C. and Dejean, A. (1985). The hepatitis B virus. Nature, 317, 489-495.