Zhang, Y., Zhang, B., Theele, D., Litwin, S., Toll, E., & Summers, J. (2003). Single-cell analysis of covalently closed circular DNA copy numbers in a hepadnavirus-infected liver. National Academy of Sciences.

Zhang, Yong-Yuan, Bai-Hua Zhang, Daniel Theele, Samuel Litwin, Eugene Toll, ja Jesse Summers. Single-cell Analysis of Covalently Closed Circular DNA Copy Numbers in a Hepadnavirus-infected Liver. National Academy of Sciences, 2003.

Zhang, Yong-Yuan, et al. Single-cell Analysis of Covalently Closed Circular DNA Copy Numbers in a Hepadnavirus-infected Liver. National Academy of Sciences, 2003.