Charles Donahue, Jr., A New Synthesis of the History of Canon Law in the Classical Period, 1140-1234, 127 Zeitschrift der Savigny-Stiftung für Rechtsgeschichte (Kanonistische Abteilung 96) 609 (2010)(reviewing The History of Medieval Canon Law in the Classical Period, 1140–1234: From Gratian to the Decretals of Pope Gregory IX (Wilfried Hartmann & Kenneth Pennington eds., 2008)).