@inproceedings{ITiCSE-2012-QueirosL,
	author        = "Ricardo Alexandre Peixoto Queirós and José Paulo Leal",
	booktitle     = "{Proceedings of the 17th Conference on Innovation and Technology in Computer Science Education}",
	doi           = "10.1145/2325296.2325344",
	isbn          = "978-1-4503-1246-2",
	pages         = "192--197",
	publisher     = "{ACM}",
	title         = "{PETCHA: a programming exercises teaching assistant}",
	year          = 2012,
}