Jackson, William Thomas Hobdell, The Progress of Parzival and the Trees of Virtue and Vice, in Jackson, William Thomas Hobdell, The Challenge of the Medieval Text. Studies in Genre and Interpretation. Edited by Joan M. Ferrante and Robert W. Hanning, Columbia University Press, New York, 1985, 218-225 (zuerst erschienen in: Germanic Review 33 (1958), 118-24)

ethischer Wortschatz: , 115,27 (218), 447,25-447,30 (221-22), 467,26-467,27 (224), 472,1-472,10 (221)

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