Internet, https://en.wikipedia.org/wiki/Kalevi_Kull (2022-03-29)
Information trouvée : Kalevi Kull (born 12 August 1952, Tartu) is a biosemiotics professor at the University
of Tartu, Estonia.Imagining nature / Andreas Roepstorff, Nils Bubandt & Kalevi Kull,
Aarhus University Press, 2003
Jakob von Uexküll : a paradigm for biology and semiotics / guest ed., Kalevi Kull,
2001. Numéro de : "Semiotica", ISSN 0037-1998, (2001)vol. 134, 1-4