@inproceedings {Fischer-Ginzinger/2005,
	title = {{A 2-Approximation Algorithm for Sorting by Prefix Reversals}},
	booktitle = {Proceedings of the 13th Annual European Symposium on Algorithms (ESA{\textquoteright}05)},
	series = {Lecture Notes in Computer Science},
	volume = {3669},
	year = {2005},
	pages = {415-425,},
	publisher = {Springer-Verlag},
	address = {Mallorca, Spain, October 3-6, 2005},
	keywords = {heun-group},
	doi = {10.1007/11561071_38},
	author = {Johannes Fischer and Simon W. Ginzinger},
	editor = {Gerth St{\o}lting Brodal and Stefano Leonardi}
}