Hemrudee, S., Konburee, A., Palakul, J., Nakmareong, S., Donpunha, W., Yonglitthipagon, P. and Chanavirut, R. 2018. A pilot study: Bed exercise with a modified bicycle “Pun Ngai” in healthy volunteers. Archives of Allied Health Sciences. 30, 2 (Sep. 2018), 216–225.