H. Delgado Acosta and E. Acuña Corrales, “Effect of an aerobic exercise program and a weight circuit program on the quality of life, dyspnea, and cardiorespiratory resistance in subjects with chronic pulmonary disease”, MHSalud, vol. 4, no. 1, Jul. 2007, doi: 10.15359/mhs.4-1.1.