Cirillo, Vincenzo. “The Representation of Staircases in Italian Treatises from the Sixteenth to Eighteenth Centurie”. diségno 1, no. 3 (December 20, 2018): pp. 177-188. Accessed June 3, 2020. https://disegno.unioneitalianadisegno.it/index.php/disegno/article/view/126.