Chongkunpon, Chalida, Raweewan Lekskulchai, and Peemongkon Wattananon. 2020. “Correlation between chest wall expansion and strength in typically developing children”. Archives of Allied Health Sciences 32 (1). Khon Kaen, Thailand:48-60. https://he01.tci-thaijo.org/index.php/ams/article/view/241854.