Shapiro, B., Ho, S. Y. W., Drummond, A. J., Suchard, M. A., Pybus, O. G., & Rambaut, A. (2011). A Bayesian Phylogenetic Method to Estimate Unknown Sequence Ages. Oxford University Press.

Shapiro, Beth, Simon Y. W. Ho, Alexei J. Drummond, Marc A. Suchard, Oliver G. Pybus, and Andrew Rambaut. A Bayesian Phylogenetic Method to Estimate Unknown Sequence Ages. Oxford University Press, 2011.

Shapiro, Beth, et al. A Bayesian Phylogenetic Method to Estimate Unknown Sequence Ages. Oxford University Press, 2011.