Strange Stories, Amazing Facts. Montreal: Reader's Digest, 1976.

Leonardo da Vinci. The Notebooks. Trans. MacCurdy, Edward. New York: Braziller George, 1958.

Leonardo da Vinci. The Notebooks Vol. I, II, III. Trans. Richtez, Jean P. New York: Dover, 1970.

Mezvin, Sabrina; Prunhubez, Carol. Woman Around The World and Through The Ages. USA: Atomium Books, 1990.

Roob, Alexander. Alchemy & Mysticism. Koln: Taschen, 1997.

Yue, David. Perspective Drawings By Programmable Calculator. New York: Van Nostzand Reinhold Co., 1984.