Priyonggo, Project, 		Khumaidi, Agus, 		Setiwan, Danis Bagus, 		Sarena, Sryang T., AND 		Adhitya, Ryan Y..
"Development of ball direction prediction system for wheeled soccer robot goalkeeper using trigonometry technique and neural network method" <em>Proceedings</em> [Online], (13 March 2020)