@misc{zimmermann,
	author = {Zimmermann and Sassman},
	title = {\textit{Efficient Group Key Signing Method}},
	note = {\url{http://sion.quickie.net/keysigning.txt}\,},
}

@misc{keylist,
	author = {Markus Schnalke},
	title = {\textit{Keysigning utilities}},
	note = {\url{http://prog.marmaro.de/keysigning/}\,},
}

@misc{sig2dot,
	author = {Darxus},
	title = {\textit{sig2dot GPG/PGP Keyring Graph Generator}},
	note = {\url{http://chaosreihns.com/code/sig2dot/}\,},
}

@misc{graphviz,
	author = {The Graphviz Team},
	title = {\textit{Graphviz -- Graph Visualization Software}},
	note = {\url{http://graphviz.org}\,},
}

@misc{fabianfingerle,
	author = {Fabian Fingerle},
	title = {\textit{Homepage}},
	note = {\url{http://fabian-fingerle.de}\,. His keysigning data is located at \url{http://datensalat.eu/~fabian/gpg-event}\,},
}

@misc{lugu,
	author = {LUG Ulm},
	title = {\textit{Homepage}},
	note = {\url{http://lugulm.de}\,},
}

@misc{signing-party,
	author = {Various contributers},
	title = {\textit{PGP Tools}},
	note = {\url{http://pgp-tools.alioth.debian.org}\,},
}