Doorly, Patrick (2004). "Dürer's 'Melencolia I': Plato's Abandoned Search for the Beautiful". The Art Bulletin. 86 (2): 255–276. doi:10.2307/3177417. JSTOR3177417.
Bałus, Wojciech (1994). "Dürer's 'Melencolia I': Melancholy and the Undecidable". Artibus et Historiae. 15 (30): 9–21. doi:10.2307/1483470. JSTOR1483470.
Weitzel, Hans (2004). "A further hypothesis on the polyhedron of A. Dürer". Historia Mathematica. 31 (11). doi:10.1016/S0315-0860(03)00029-6.
Sohm, Philip L. (1980). "Dürer's 'Melencolia I': The Limits of Knowledge". Studies in the History of Art. 9: 13–32. JSTOR42617907.
Doorly, Patrick (2004). "Dürer's 'Melencolia I': Plato's Abandoned Search for the Beautiful". The Art Bulletin. 86 (2): 255–276. doi:10.2307/3177417. JSTOR3177417.
Bałus, Wojciech (1994). "Dürer's 'Melencolia I': Melancholy and the Undecidable". Artibus et Historiae. 15 (30): 9–21. doi:10.2307/1483470. JSTOR1483470.
The engraving's common second state. For the first state, see the version from
the collection of Sir Thomas Barlow, which differs in the number nine in the magic square.