@inproceedings{POPL-2009-TozawaTOM,
	author        = "Akihiko Tozawa and Michiaki Tatsubori and Tamiya Onodera and Yasuhiko Minamide",
	booktitle     = "{Proceedings of the 36th Symposium on Principles of Programming Languages}",
	doi           = "10.1145/1480881.1480908",
	editor        = "Zhong Shao and Benjamin C. Pierce",
	isbn          = "978-1-60558-379-2",
	pages         = "200--212",
	publisher     = "{ACM}",
	title         = "{Copy-on-write in the PHP language}",
	year          = 2009,
}