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, R. K.; Sarmah, B.; Singh, T.; Kushwah, G. S.; Akyildiz, Z.; Ramirez-Campillo, R. (Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology, 2025)