@inproceedings{PPDP-2005-Skalka,
	author        = "Christian Skalka",
	booktitle     = "{Proceedings of the Seventh International Conference on Principles and Practice of Declarative Programming}",
	doi           = "10.1145/1069774.1069787",
	isbn          = "1-59593-090-6",
	pages         = "139--150",
	publisher     = "{ACM}",
	title         = "{Trace effects and object orientation}",
	year          = 2005,
}