@book{21592,
	author = {Mathelitsch, Leopold, ed. and Plessas, Willibald, ed.},
	title = {Broken Symmetries},
	publisher = {Springer Berlin Heidelberg},
	year = {1999},
	series = {Lecture Notes in Physics},
	address = {Heidelberg, Berlin},
	url = {http://doi.org/10.1007/BFb0105520}
}