Test-retest reliability and comparison of single- and dual-beam photocell timing system with video-based applications to measure linear and change of direction sprint times. - Thapa, Rohit K; Sarmah, Bhargav; Singh, Tanvi; Kushwah, Gaurav S; Akyildiz, Zeki; Ramirez-Campillo, Rodrigo (Proceedings of the Institution of Mechanical Engineers -- Part P -- Journal of Sports Engineering & Technology, 2025)