Loomis, Roger Sherman, The Origin of the Grail Legends, in Loomis, Roger Sherman, Arthurian Literature in the Middle Ages. A Collaborative History, Oxford University Press, Oxford, 1959 (Nachdruck 2001), 274-294

Gral:

Quellen - Keltisches: 128,3-128,12 (292 Anm. 4), 140,26-141,10 (292 Anm. 4), 238,8-239,7 (292 Anm. 6), 250,25-250,30 (293 Anm. 3), 469,18-469,27 (293 Anm. 1), 479,8-479,12 (279 Anm. 2)