@book{king_ciphers_2001,
	address = {Stuttgart},
	title = {The {Ciphers} of the {Monks}: {A} {Forgotten} {Number}-{Notation} of the {Middle} {Ages}},
	isbn = {3515076409},
	shorttitle = {The ciphers of the monks},
	publisher = {F. Steiner},
	author = {King, David A.},
	year = {2001},
	keywords = {Astrolabes -- History., Astronomy, Medieval -- Instruments., Ciphers -- History., Manuscripts, Medieval., Numerals, Writing of -- History., Numeration -- History., cryptography -- medieval}
}