Sicardus (Bishop of Cremona, † 1215).—Mitrale. Migne, Patr. Lat., ccxiii.
Innocent III. (Pope, † 1216).—De S. Altaris Mysterio libri sex. Migne, Patr. Lat., ccxvii.
Odericus (Canon of Siena, 1213).—Ordo Officiorum Eccl. Senensis. Ed. Trombelli. Bononiæ, 1766.
Codinus.—Curopalates s. de Officialibus Palatii Constantinopolitani et de Officiis Magnæ Ecclesiæ. Rec. Imm. Bekker. Bonn, 1839.
(B) MORE RECENT WORKS EMPLOYED OR REFERRED TO
(a) By Catholic Authors
Allatius, Leo.—De Dominicis et Hebdomadibus Græcorum Recentiorum. Col., 1648.
Arens, Franz.—Der Liber Ordinarius der Essener Stiftskirche, Essen, 1901.
Assemani, Jos. Sim.—Kalendaria Ecclesiæ Univ. Romæ, 1730. Six vols.
Baillet, Adrien († 1706).—Les Vies des Saints. Paris, 1703; second ed. 1739, in ten vols. 4to. Vol. ix. contains a history of the movable feasts.