>Paul Bracken, 'Halt sunt li pui': Towards a Performance of the Chanson de Roland, Nottingham Mediaeval Studies, 57, 2003 : p. 73-106
>Cyril Ernest Wright, Fontes Harleiani. a study of the sources of the Harleian collection of manuscripts preserved in the Department of Manuscripts in the British Museum, Londres, printed by order of the Trustees, 1972