Hoffmeyer, Jesper. “S/E ≥ 1: A Semiotic Understanding of Bioengineering”. Sign Systems Studies 29, no. 1 (December 31, 2001): 277-291. Accessed January 19, 2022. https://ojs.utlib.ee/index.php/sss/article/view/SSS.2001.29.1.17.