Evans, Oliver (Oct–Dec 1951). "Selections from the Bestiary of Leonardo da Vinci". The Journal of American Folklore. 64 (254): 393–396. doi:10.2307/537007. JSTOR537007.
Henderson, Arnold Clayton (January 1982). "Medieval Beasts and Modern Cages: The Making of Meaning in Fables and Bestiaries". Publications of the Modern Language Association of America. 97 (1): 40–49. doi:10.2307/462239. JSTOR462239. S2CID164019988.
Lippincott, Louise W. (1981). "The Unnatural History of Dragons". Philadelphia Museum of Art Bulletin. 77 (334): 3–24. doi:10.2307/3795303. JSTOR3795303.
Evans, Oliver (Oct–Dec 1951). "Selections from the Bestiary of Leonardo da Vinci". The Journal of American Folklore. 64 (254): 393–396. doi:10.2307/537007. JSTOR537007.
Henderson, Arnold Clayton (January 1982). "Medieval Beasts and Modern Cages: The Making of Meaning in Fables and Bestiaries". Publications of the Modern Language Association of America. 97 (1): 40–49. doi:10.2307/462239. JSTOR462239. S2CID164019988.
Lippincott, Louise W. (1981). "The Unnatural History of Dragons". Philadelphia Museum of Art Bulletin. 77 (334): 3–24. doi:10.2307/3795303. JSTOR3795303.
Henderson, Arnold Clayton (January 1982). "Medieval Beasts and Modern Cages: The Making of Meaning in Fables and Bestiaries". Publications of the Modern Language Association of America. 97 (1): 40–49. doi:10.2307/462239. JSTOR462239. S2CID164019988.
de Cuba, Jean (1501). Garden Of Health (in French). Verard Antoine (Paris). Archived from the original on 2016-11-15. Retrieved 2014-09-15.{{cite book}}: CS1 maint: bot: original URL status unknown (link)