Opera omnia . I , Tractatus de Immaculata Conceptione Beatae Mariae Virginis - Enrique de Werla (O.F.M.) 1400-1463; Clasen, Sophronius (O.F.M.) 1909-1974 (St. Bonaventure, N. Y. [etc.] The Franciscan Institute [etc.], 1955)