2001. Karol, K. G., McCourt, R. M., Cimino, M. T., Delwiche, C. F. The closest living relatives of land plants. Science 294: 2351-2353

2000. McCourt, R. M., Karol, K. G., Bell, J., Helm-Bychowski, K., Grajewska, A., Wojciechowski, M. F., and Hoshaw, R. W. Phylogeny of the conjugating green algae (Zygnemophyceae: Desmidiales, Zygnematales) based on rbcL sequences. Journal of Phycology 36:747-758.

1999. McCourt, R.M., Karol, K.G., and Casanova, M.T. Monophyly of Genera and Species of Characeae Based on rbcL Sequences, with special reference to Australian and European Lychnothamnus barbatus (Characeae: Charophyceae). Australian Journal of Botany 47 (1):361-369.

1998. Chapman R.L., Buchheim M.A., Delwiche C.F., Friedl T., Huss V.A.R., Karol K.G., Lewis L.A., Manhart J., McCourt R.M., Olsen J.L., and Waters D.A. 1998. Molecular systematics of the green algae. pp. 508-540. In Soltis P., Soltis D., & Doyle, J.J. (Eds.) Molecular Systematics of Plants II. Chapman and Hall.

1996. McCourt R.M., Karol K.G., Guerlisquine M., and Feist M. Phylogeny of extant genera in the Family Characeae (Division Charophyta) based on rbcL sequences and morphology. American Journal of Botany 83(1): 125-131.

1996. McCourt, R.M., Meiers S., Karol K.G., and Chapman, R.L. Molecular systematics of the Charales. pp. 323-336. In Chaudhary B.R. and Agrawal S.B. [Eds.] Cytology, Genetics and Molecular Biology of Algae. SPB Publishing, Amsterdam.

1996. Park, N.E., Karol, K.G., Hoshaw, R.W., and McCourt, R.M. Phylogeny of Gonatozygon and Genicularia (Gonatozygaceae, Desmidiales) based on rbcL sequences. European Journal of Phycology 31:309-313.

1995. McCourt R. M., Karol K., Kaplan S., and Hoshaw R.W. Using rbcL sequences to test hypotheses of chloroplast and thallus evolution in conjugating green algae (Zygnematales, Charophyceae). Journal of Phycology 31:989-995.

1995. McCourt, R. M. Green algal phylogeny. Trends in Ecology and Evolution 10: 159-163.