De sacramentis : supplementum: De nova disciplina circa ieiunium eucharisticum (n. 137 sqq. et 237 sqq.) - Hürth, Franz. (OLS)http://ftis/name/66253; Abellán, Pedro Maria. (OLS)http://ftis/name/66254 (in aedibus Pont. Universitatis Gregorianae,, 1953)