>Diane E. Booton, Manuscripts, market and the transition to print in late medieval Brittany, Farnham, Burlington (VT), Ashgate, 2010
>Anne-Françoise Leurquin et Edith Brayer, La Somme le Roi par Frère Laurent, Société des Anciens Textes Français, Paris, Firmin Didot puis Picard, 2008
Commentaire : p. 502
>Ellen Virginia Kosmer, A Study of the Style and Iconography of the Thirteenth-century «Somme le roi», British Museum Ms. Add. 54180, with a Consideration of Other Illustrated Somme Manuscripts of the Thirteenth, Fourteenth and Fifteenth Centuries, 1973