Greenwood, P. M., Lin, M., Sundararajan, R., Fryxell, K. J., & Parasuraman, R. (2009). Synergistic effects of genetic variation in nicotinic and muscarinic receptors on visual attention but not working memory. National Academy of Sciences.

Greenwood, P. M., M.-K Lin, R. Sundararajan, K. J. Fryxell, and R. Parasuraman. Synergistic Effects of Genetic Variation in Nicotinic and Muscarinic Receptors On Visual Attention but Not Working Memory. National Academy of Sciences, 2009.

Greenwood, P. M., et al. Synergistic Effects of Genetic Variation in Nicotinic and Muscarinic Receptors On Visual Attention but Not Working Memory. National Academy of Sciences, 2009.