Ausaf, Q. ul A., G. N. Nizami, and A. A. Khan. “EFFECTS OF BUTEYKO BREATHING TECHNIQUE AND CONVENTIONAL PHYSICAL THERAPY IN ADULT BRONCHIAL ASTHMA: A RANDOMIZED CONTROL TRAIL”. Pakistan Journal of Rehabilitation, vol. 6, no. 1, Dec. 2020, pp. 36-44, http://ojs.zu.edu.pk/ojs/index.php/pjr/article/view/765.