Bibliographie
Faith WALLIS, « Images of order in the medieval computus », Ideas of order in the Middles Ages, Binghamton, New York, Center for Medieval and Early Renaissance Studies, 1990 (Acta, 15), p. 45-68 : 4 fig.
Warren GINSBERG (éd.), Ideas of order in the Middles Ages
p. 45-68 : 4 fig.
Etude
Chapitre de livre
non
"BHA 1991, 2, n° 5514".