@article {1498853,
	title = {Combining rules and machine learning for extraction of temporal expressions and events from clinical narratives   },
	journal = {Journal of the American Medical Informatics Association},
	volume = {20},
	number = {5},
	year = {2013},
	pages = {859-866},
	author = {Aleksandar Kova{\v c}evi{\'c} and Azad Dehghan and Michele Filannino and John A Keane and Goran Nenadic}
}
