Machado, Irene. “Lotman’s Scientific Investigatory Boldness: The Semiosphere As a Critical Theory of Communication in Culture”. Sign Systems Studies 39, no. 1 (June 1, 2011): 81–104. Accessed April 20, 2024. https://ojs.utlib.ee/index.php/sss/article/view/SSS.2011.39.1.03.