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* [https://dreher.netzliteratur.net/4_Medienkunst_Text.html Thomas Dreher, Der Beobachter als Akteur in Happenings] | * [https://dreher.netzliteratur.net/4_Medienkunst_Text.html Thomas Dreher, Der Beobachter als Akteur in Happenings] | ||
* [https://www.univie.ac.at/constructivism/HvF.htm Heinz von Förster Homepage] | * [https://www.univie.ac.at/constructivism/HvF.htm Heinz von Förster Homepage] | ||
* [http://www.ruderal.com/pdf/ruderalaesthetics.pdf On | * [http://www.ruderal.com/pdf/ruderalaesthetics.pdf On "Ruderal Aesthetics" by Sarah Cowles] | ||
== artists == | == artists == | ||