Cunningham, T. J., Ford, E. S., Rolle, I. V., Wheaton, A. G., & Croft, J. B. (2014). Associations of Self-Reported Cigarette Smoking with Chronic Obstructive Pulmonary Disease and Co-Morbid Chronic Conditions in the United States. COPD.

Cunningham, Timothy J., Earl S. Ford, Italia V. Rolle, Anne G. Wheaton, and Janet B. Croft. "Associations of Self-Reported Cigarette Smoking With Chronic Obstructive Pulmonary Disease and Co-Morbid Chronic Conditions in the United States." COPD 2014.

Cunningham, Timothy J., et al. "Associations of Self-Reported Cigarette Smoking With Chronic Obstructive Pulmonary Disease and Co-Morbid Chronic Conditions in the United States." COPD 2014.