Usmani, Z. A., Carson, K. V., Heslop, K., Esterman, A. J., De Soyza, A., & Smith, B. J. (2017). Psychological therapies for the treatment of anxiety disorders in chronic obstructive pulmonary disease. Cochrane Database Syst Rev.

Usmani, Zafar A., Kristin V. Carson, Karen Heslop, Adrian J. Esterman, Anthony De Soyza, och Brian J. Smith. "Psychological Therapies for the Treatment of Anxiety Disorders in Chronic Obstructive Pulmonary Disease." Cochrane Database Syst Rev 2017.

Usmani, Zafar A., et al. "Psychological Therapies for the Treatment of Anxiety Disorders in Chronic Obstructive Pulmonary Disease." Cochrane Database Syst Rev 2017.