Robuta

https://www.macba.cat/es/repositorio-digital/?slug=a00260-an-anthology-of-chance-operations---by-george-brecht--et-al--la-monte-young-editor--george-maciunas-designer

https://zkm.de/en/event/2006/10/silent-music-george-brecht-opening

https://www.centrepompidou.fr/en/ressources/personne/cMdGBXa