CHIA, Michael, and Jin Jong QUEK. “Efficacy of OTO Power Stretch Apparatus in Training for Abdominal and Upper Body Muscular Endurance: OTO力牽張儀在訓練腹部與上身肌肉耐力中的作用”. Asian Journal of Physical Education & Recreation 8, no. 2 (December 1, 2002): 62–66. Accessed April 16, 2024. https://ejournals.lib.hkbu.edu.hk/index.php/ajper/article/view/1272.