In 1969, John M Armleder co-founded in Geneva the Ecart Performance Group with Patrick Lucchini and Claude Rychner.This collective artistic adventure, in the continuity of Fluxus, evolved to become an independent space and self-managed gallery, a publishing house, a bookshop... The Ecart group is recognized as one of the most important relays of the experimental art of the 70s in Switzerland.List of Authors: Jean-Christophe Amman, John M Armleder, Anna Banana, Christian Besson, Yann Chateigné, Giuseppe Chiari, Adelina von Fürstenberg, Groupe Ecart, Dick Higgins, Elisabeth Jobin, Rainer Michael Mason, Olivier Mosset, Catherine Quéloz and Dieter Schwarz.Co-published with Walther König and Lionel Bovier in associated with MAMCO.