Bradstreet, T. C., and T. J. Parkman. “Behavioral Medicine Treatment for Patients With Chronic Obstructive Pulmonary Disease”. The Southwest Respiratory and Critical Care Chronicles, Vol. 4, no. 13, Jan. 2016, pp. 45-48, https://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/250.