Rolker, C.  (2023).  Canon Law in the Age of Reforms (c. 1000 to c. 1150). History of Medieval Canon Law. Washington (D.C.): The Catholic University of America Press.

Rolker, C.  (2020).  Monastic canon law in the tenth, eleventh and twelfth centuries. In A.  Beach & Cochelin, I. (Red.), The Cambridge History of Medieval Monasticism in the Latin West. I. Origins to the Eleventh Century (pp. 618-630O). Cambridge: Cambridge University Press.