CohnSee B., Der Almanach perpetuum des Abraham Zacuto (Strassburg, 1918); BurgosCantera F., “El judío salmantino Abraham Zacut”, Revista de la Academia de Ciencias Exactas, Físicas y Naturales, Madrid, xxvii (1931), 63–398.
2.
More recently, Chabás has described a Castilian manuscript, dated to 1396, that is closely related to the 1483 Alfonsine Tables and John of Saxony's canon, thereby pushing back by another sixty years the re-entry of the Alfonsine Tables into Spain. See his “Astronomía alfonsí en Morella a finales del siglo XIV”, Cronos, iii (2000), 381–91.