Ruplin, Ferdinand Alexander, A Consideration of Humor in the Middle High German Courtly Epic, with Special Emphasis on Gottfried's 'Tristan und Isold'. PhD Thesis, Univ. of Minnesota, Minneapolis, 1965 (masch. Ann Arbor Microfilms, 66-12, 276. DissAbstr 27 (1966/67), 1793-A)

Humor: