Bellamy, D., Bouchard, J., Henrichsen, S., Johansson, G., Langhammer, A., Reid, J., . . . Buist, S. (2006). International Primary Care Respiratory Group (IPCRG) Guidelines: Management of Chronic Obstructive Pulmonary Disease (COPD). Prim Care Respir J.

Bellamy, David, Jacques Bouchard, Svein Henrichsen, Gunnar Johansson, Arnulf Langhammer, Jim Reid, Chris van Weel, and Sonia Buist. "International Primary Care Respiratory Group (IPCRG) Guidelines: Management of Chronic Obstructive Pulmonary Disease (COPD)." Prim Care Respir J 2006.

Bellamy, David, et al. "International Primary Care Respiratory Group (IPCRG) Guidelines: Management of Chronic Obstructive Pulmonary Disease (COPD)." Prim Care Respir J 2006.