Meeks, John, The Temple of the Grail, in Forward, William, Wolpert, Andrew, The Quest for the Grail, The Golden Blade, 47, Floris Books, Edinburgh, 1994, 46-59
in Forward und Wolpert 1994
Rezeption (sekundär - Neuzeit):
Steiner, Rudolf (Anthroposophie):
, 240,27 (46)