Pryer, Anthony J.. 2002. Thirty items for the revised edition of the Oxford Companion to Music: Braille Notation, Chironomy, Coloration, Corona, Degree, Durum, Diastematic Neumes, Franconian Notation, Graphic Notation, Half-Coloration, Ligatures, Mensural Music, Mensural Notation, Middle C Modus, Mollis, Prolatio, Shape Note, Tempus, Accidental, Clef, Dot, Intabulation, Intavolatura, Liquescent Nuemes, Mensurstrich, Musica Ficta, Notation, Tablature, Time Signature. In: Alison Latham, ed. The Oxford Companion to Music. Oxford: Oxford University Press, p. 159. ISBN 0198662122 [Book Section]