Jean Frappier, "Chrétien de Troyes: The Man and His Work". Translated by Raymond J. Cormier. Athens, Ohio: Ohio University Press, 1982. <An authorized translation of the second French edition, 1968, with introduction, expanded notes, enlarged updated bibliography, and index by the translator; has been cited in more than 150 scientific books/papers since its publication; cited in extenso in "Classical and Medieval Literature Criticism", 1993.>
Idris Llewelyn Foster, "Gereint, Owein and Peredur" in Arthurian Literature in the Middle Ages, Roger S. Loomis (ed.). Clarendon Press: Oxford University. 1959.
K. Sarah-Jane Murray, "A Preface to Chretien de Troyes," Syracuse University Press, 2008. ISBN 0-8156-3160-X
Gerald Seaman, "Signs of a New Literary Paradigm: The 'Christian' Figures in Chrétien de Troyes," in: Nominalism and Literary Discourse, ed. Hugo Keiper, Christoph Bode, and Richard Utz (Amsterdam: Rodopi, 1997), pp. 87-109.
Albert W. Thompson, "The Additions to Chrétien's Perceval" in Arthurian Literature in the Middle Ages, Roger S. Loomis (ed.). Clarendon Press: Oxford University. 1959