Wadding, Scriptores Ord. Minorum (1650), 59, and Sbaralea, Supplementum (1806), 135; Fabricius, Bib. Med. Aev. (1734), 218; Danou, Hist. Litt. France (1838), XIX, 437; Denifle, Archiv. f. litt. und Kirchengesch. des M. A. (1885), I, 145 sqq. and 630 sqq., also Misc. Francescana (1886), I, L sqq.; Othon, L'Aquitaine Seraphique (1900), I, passim.