Claudine Chavannes-Mazel, Expanding Rubrics for the Sake of a Layout : Mise en page as evidence for a particular scribe ?, Medieval Book Production. Assessing the Evidence. Proceedings of the second conference of the seminar on the history of the book to 1500. Oxford, july 1988, Los Altos Hills, The red gull Press, 1990 : p. 117-131