Wannaprom, Nipaporn, Kamonjutha Onket, Jakkapop Puachaikul, and Sureeporn Uthaikhup. 2017. “Muscle thickness of serratus anterior muscle during performing wall push-up plus and standard push-up plus using ultrasound imaging”. Journal of Associated Medical Sciences 50 (3):371. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/77279.