Hogan, D. J., Hewitt, E. A., Orr, K. E., Prescott, D. M., & Müller, K. M. (2001). Evolution of IESs and scrambling in the actin I gene in hypotrichous ciliates. The National Academy of Sciences.

Hogan, Daniel J., Elizabeth A. Hewitt, Kindra E. Orr, David M. Prescott, och Kirsten M. Müller. Evolution of IESs and Scrambling in the Actin I Gene In Hypotrichous Ciliates. The National Academy of Sciences, 2001.

Hogan, Daniel J., et al. Evolution of IESs and Scrambling in the Actin I Gene In Hypotrichous Ciliates. The National Academy of Sciences, 2001.