Chebanov, Sergey V., and Anton Markoš. “A Text on Biosemiotic Themes”. Sign Systems Studies 37, no. 1/2 (December 15, 2009): 332–343. Accessed April 26, 2024. https://ojs.utlib.ee/index.php/sss/article/view/SSS.2009.37.1-2.13.