B. Anap, Deepak, Sarvesh Vivekanand Rasal, and Abhijit D. Diwate. “Inter and Intra-Rater Reliability and Validity of an Instrument Made in Rural Set up to Measure Maximum Inspiratory Pressure Termed As Dhiraj Maximum Inspiratory Pressure Device”. International Journal of Clinical and Biomedical Research (July 31, 2020): 13–17. Accessed July 23, 2021. http://archives.sp.oajour.info/index.php/ijcbr/article/view/371.