@inproceedings{KDIR-2012-MountassirBB,
	author        = "Asmaa Mountassir and Houda Benbrahim and Ilham Berrada",
	booktitle     = "{Proceedings of the Fourth International Conference on Knowledge Discovery and Information Retrieval}",
	isbn          = "978-989-8565-29-7",
	pages         = "306--311",
	publisher     = "{SciTePress}",
	title         = "{Addressing the Problem of Unbalanced Data Sets in Sentiment Analysis}",
	year          = 2012,
}