Torsten Rüting
History and significance of Jakob von Uexküll and of his institute in Hamburg
2004
Sign systems studies 32/1-2
Jakob von Uexküll ja ta instituut Hamburgis: ajalugu ja tähtsus. kokkuvõte
2004
Sign systems studies 32/1-2
Signs and the design of life: Uexküll's significance today: a symposium, its significant history and future
2004
Sign systems studies 32/1-2