von Uexküll, jr, Jakob. “Jakob Von Uexküll and Right Livelihood — the Current Actuality of His Weltanschauung1”. Sign Systems Studies 32, no. 1/2 (December 31, 2004): 363–371. Accessed April 25, 2024. https://ojs.utlib.ee/index.php/sss/article/view/SSS.2004.32.1-2.16.