>Jeanne-Marie Boivin, Naissance de la fable en français: l'"Isopet de Lyon" et l'"Isopet I-Avionnet", Essais sur le Moyen Âge, 33, Paris, Champion, 2006
>Keith Busby, Codex and Context. Reading Old French Verse Narrative in Manuscript, New York, Rodopi, 2002
>Marvin Ward, Catalogue of Romances in the Department of Manuscripts in the British Museum, Londres, printed by order of the Trustees, 1883-1893