@inproceedings{VS-Games-2012-CuratelliM,
	author        = "Francesco Curatelli and Chiara Martinengo",
	booktitle     = "{Proceedings of the Fourth International Conference on Games and Virtual Worlds for Serious Applications}",
	doi           = "10.1016/j.procs.2012.10.061",
	pages         = "92--102",
	publisher     = "{Elsevier}",
	title         = "{Design Criteria for Educational Tools to Overcome Mathematics Learning Difficulties}",
	year          = 2012,
}