@inproceedings{overbey13immutable,
	Author = {Jeffrey L. Overbey},
	Booktitle = {Proceedings of the 20th Conference on Pattern Languages of Programs (PLoP '13)},
	Pages = {7:1--7:8},
	Publisher = {The Hillside Group},
	Title = {{I}mmutable {S}ource-mapped {A}bstract {S}yntax {T}ree: {A} Design Pattern for Refactoring Engine {APIs}},
	Url = {http://dl.acm.org/citation.cfm?id=2725669.2725678},
	Year = {2013}}