Wang, S. V., Coull, B. A., Schwartz, J., Mittleman, M. A., & Wellenius, G. A. (2011). Potential for Bias in Case-Crossover Studies With Shared Exposures Analyzed Using SAS. Oxford University Press.

Wang, Shirley V., Brent A. Coull, Joel Schwartz, Murray A. Mittleman, و Gregory A. Wellenius. Potential for Bias in Case-Crossover Studies With Shared Exposures Analyzed Using SAS. Oxford University Press, 2011.

Wang, Shirley V., et al. Potential for Bias in Case-Crossover Studies With Shared Exposures Analyzed Using SAS. Oxford University Press, 2011.