Freitas, T. A. K., Hou, S., Dioum, E. M., Saito, J. A., Newhouse, J., Gonzalez, G., . . . Alam, M. (2004). Ancestral hemoglobins in Archaea. National Academy of Sciences.

Freitas, Tracey Allen K., Shaobin Hou, Elhadji M. Dioum, Jennifer A. Saito, James Newhouse, Gonzalo Gonzalez, Marie-Alda Gilles-Gonzalez, and Maqsudul Alam. Ancestral Hemoglobins in Archaea. National Academy of Sciences, 2004.

Freitas, Tracey Allen K., et al. Ancestral Hemoglobins in Archaea. National Academy of Sciences, 2004.