Mueller, R. R. (1977). Festival and fiction in Heinrich Wittenwiler's Ring: A study of the narrative in its relation to the traditional topoi of marriage, folly, and play. J. Benjamins.

Mueller, Rolf R. Festival and Fiction in Heinrich Wittenwiler's Ring: A Study of the Narrative in Its Relation to the Traditional Topoi of Marriage, Folly, and Play. Amsterdam: J. Benjamins, 1977.

Mueller, Rolf R. Festival and Fiction in Heinrich Wittenwiler's Ring: A Study of the Narrative in Its Relation to the Traditional Topoi of Marriage, Folly, and Play. J. Benjamins, 1977.