Cummings, I. W., Browne, J. K., Salser, W. A., Tyler, G. V., Snyder, R. L., Smolec, J. M., & Summers, J. (1980). Isolation, characterization, and comparison of recombinant DNAs derived from genomes of human hepatitis B virus and woodchuck hepatitis virus.

Cummings, I W., J K. Browne, W A. Salser, G V. Tyler, R L. Snyder, J M. Smolec, und J. Summers. Isolation, Characterization, and Comparison of Recombinant DNAs Derived From Genomes of Human Hepatitis B Virus and Woodchuck Hepatitis Virus. 1980.

Cummings, I W., et al. Isolation, Characterization, and Comparison of Recombinant DNAs Derived From Genomes of Human Hepatitis B Virus and Woodchuck Hepatitis Virus. 1980.