H. M. Haytham and  E. A. Azza and  E.S. Mohamed and  E. G. Nesreen,  Response of Diaphragmatic Excursion to Inspiratory Muscle Trainer Post Thoracotomy .   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 109(1). 15 - 18
    [viewed 04 December 2021]. Available from: https://publications.waset.org/pdf/10003381.