Brunsfeld, Steven J., Pamela E. Soltis, Douglas E. Soltis, Paul A. Gedek, Christopher J. Quinn, Darren D. Strenge and Tom A. Ranker. 1994. Phylogenetic relationships among the genera of Taxodiaceae and Cupressaceae: evidence from rbcL sequences. Systematic Botany 19(2): 253-262.