Origins of papal infallibility, 1150-1350 : a study on the concepts of infallibility, sovereignity and tradition in the Middle Ages / by Brian Tierney. - Leiden [etc.] : E.J. Brill, 1988. - VIII, 327 p. ; 25 cm - Studies in the history of Christian thought ; 6 . - Studies in the history of Christian thought ; 6. .