Skinner, Margot A. “Hand Made History: Forced Expiration Exercises in Asthma and Their Effect on FEV”. New Zealand Journal of Physiotherapy 40, no. 2 (July 1, 2012): 48–50. Accessed July 3, 2024. https://nzjp.otago.ac.nz/nzjp/article/view/25.