Walshe, Maurice O'Connell, The Graal Castle and the Cave of Lovers, in Scholler, Harald, The Epic In Medieval Society. Aesthetic and Moral Values, Niemeyer, Tübingen, 1977, 257-270

Gottfried von Straßburg: , 2,5-2,16 (270), 2,23-3,24 (266), 226,6-226,9 (263), 230,13 (262), 238,18-238,20 (263), 238,21-238,24 (263), 253,16-253,17 (265), 284,3 (268 Anm. 29), 503,1 (262, 268), 827,19-827,24 (265)