Dawson, A. L., Tinker, S. C., Jamieson, D. J., Hobbs, C. A., Rasmussen, S. A., & Reefhuis, J. (2014). Epidemiology of twinning in the National Birth Defects Prevention Study, 1997–2007. Birth Defects Res A Clin Mol Teratol.

Dawson, April L., Sarah C. Tinker, Denise J. Jamieson, Charlotte A. Hobbs, Sonja A. Rasmussen, et Jennita Reefhuis. "Epidemiology of Twinning in the National Birth Defects Prevention Study, 1997–2007." Birth Defects Res A Clin Mol Teratol 2014.

Dawson, April L., et al. "Epidemiology of Twinning in the National Birth Defects Prevention Study, 1997–2007." Birth Defects Res A Clin Mol Teratol 2014.