>John Joseph Norman Palmer, The authorship, date and historical value of the French chronicles on the Lancastrian Revolution, Bulletin of the John Rylands Univ. Library of Manchester, 61, 1978-79 : p. 145-181 et 398-421
>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