@inproceedings{heckIWPSE2013,
	author          = {Petra Heck and Andy Zaidman},
	title           = {An Analysis of Requirements Evolution in Open Source Projects: Recommendations for Issue Trackers},
	booktitle       = {Proceedings of the 13th International Workshop on Principles of Software Evolution (IWPSE 2013)},
	publisher       = {ACM},
	year            = {2013},
	editor          = {Romain Robbes and Gregorio Robles},
	pages           = {43-52},
	isbn            = {978-1-4503-2311-6},
	url             = {http://dl.acm.org/citation.cfm?doid=2501543.2501550},
	project         = {EQUA},
	topic           = {Requirements Engineering},
	group           = {SE}
}