@book{99181,
	author = {Huebener, R.P., Schopohl, N. and Volovik},
	title = {Vortices in Unconventional Superconductors and Superfluids},
	publisher = {Springer-Verlag},
	year = {2002},
	series = {Springer Series in Solid-State Sciences},
	address = {New York}
}