与此同时，在A. R. Penck的生活中
完整生平May 1971
Founds the artist group GAP
In May 1971, together with Steffen Terk, Wolfgang Opitz and Harald Gallasch, Winkler becomes one of the founding members of the artist group GAP, which exists until 1976.
1972
Documenta 5 in Kassel
Penck takes part in Documenta 5 in Kassel (Fridericianum).
1972年6月30日–1972年10月8日
Exhibition: Documenta 5
1973
New pseudonyms: Mike Hammer and TM
From 1973 Winkler works under the pseudonyms Mike Hammer and TM; from 1976 he also signs simply “Y”.
