@book{21759,
	author = {Choi, Kang-Sin, ed. and Kim, Jihn E., ed.},
	title = {Quarks and Leptons From Orbifolded Superstring},
	publisher = {Springer Berlin Heidelberg},
	year = {2006},
	series = {Lecture Notes in Physics},
	address = {Heidelberg, Berlin},
	url = {http://doi.org/10.1007/b11681670}
}