@inproceedings{ISSTA-2013-HillsKV,
	author        = "Mark Hills and Paul Klint and Jurgen J. Vinju",
	booktitle     = "{Proceedings of the 22nd International Symposium on Software Testing and Analysis}",
	doi           = "10.1145/2483760.2483786",
	isbn          = "978-1-4503-2159-4",
	pages         = "325--335",
	publisher     = "{ACM}",
	title         = "{An empirical study of PHP feature usage: a static analysis perspective}",
	year          = 2013,
}