Francisco, R., 		Pereira Júnior, C., & 		Ambrósio, A.
(2016).
 Online Judge in Introductory Programming Education - A Systematic Literature Review.
In <em>Proceedings of the 27th Brazilian Symposium on Computers in Education</em>, (pp. 11-20). Porto Alegre: SBC.
doi:10.5753/cbie.sbie.2016.11