Hartmann, W., & Pennington, K..  (2016).   The History of Courts and Procedure in Medieval Canon Law. History of Medieval Canon Law. Was: The Catholic University Press.

Hartmann, W., & Pennington, K..  (2012).   The History of Byzantine and Eastern Canon Law to 1500. History of Medieval Canon Law. Washington (D.C.): The Catholic University Press.

Hartmann, W., & Pennington, K..  (2008).   The History of Medieval Canon Law in the Classical Period, 1140-1234. History of Medieval Canon Law. Washington (D.C.): The Catholic University Press.

Vervaart, O.  (2001).  Argumentation in Practice. Nicolaus Everardi (1462-1532) on Canon Law and Custom in the Low Countries. In K.  Pennington, Chodorow, S., & Kendall, K. H. (Red.), Proceedings of the Tenth International Congress of Medieval Canon Law: Syracuse, New York, 13 - 18 August 1996 (Vol. 11, pp. 635-652). Città del Vaticano: Bibliotheca Apostolica Vaticana.