KUTTNER, Stephan: The history of ideas and doctrines of canon law in the Middle Ages (Collected studies series 113; London, Variorum Reprints, 1980), paginación original en cada pieza, 232 X 156 milímetros. Idem, Medieval councils, decretals and collections of canon law. Selected essays (Collected studies series 126; London, Variorum Reprints, 1980), paginación original en cada pieza, 232 X 156 mm.