von Uexküll T, Rüting T. Eye witnessing Jakob von Uexküll’s Umwelttheory. SSS [Internet]. 2004 Dec. 31 [cited 2024 May 1];32(1/2):373-4. Available from: https://ojs.utlib.ee/index.php/sss/article/view/SSS.2004.32.1-2.17