@article {550,
	title = {Extracting Drug-Drug interaction from text using negation features},
	journal = {Procesamiento del Lenguaje Natural},
	volume = {51},
	year = {2013},
	chapter = {49},
	issn = {1135-5948},
	author = {Bokharaeian, Behrouz and D{\'\i}az, Alberto and Miguel Ballesteros}
}
