Steinmetz, Gustavo, 		Eich, Luís, 		Schroeder, Gustavo, 		Francisco, Rosemary, AND 		Barbosa, Jorge.
" XPCodeHub: A gamified system model for learning programming through knowledge trails" <em>Proceedings of the Brazilian Symposium on Computers in Education (SBIE)</em> [Online], (16 November 2022)