^Malcolm Jones (1989), "Folklore Motifs in Late Medieval Art I: Proverbial Follies and Impossibilities", Folklore, 100 (2): 201–217, doi:10.1080/0015587X.1989.9715766
^Edgar Wind (1943), "Milking the Bull and the He-Goat", Journal of the Warburg and Courtauld Institutes
^Malcolm Jones (2009), "Lively Representing the Proverbs", The Proverbial Pied Piper, Peter Lang, p. 5, ISBN9781433104893