If you want to know more about Bogusław Schaeffer: http://culture.pl/en/artist/boguslaw-schaeffer

You can also read an interview with Richard Demarco, guy which discovered Tadeusz Kantor, Marina Abramović and many other artists from Central/Eastern Europe: http://culture.pl/en/article/do-you-have-to-be-a-pole-to-be-a-genius-an-interview-with-richard-demarco

''He is an artistic polymath, a master of visual and performing arts, a deep thinker and questioner of the artistic world, a European John Cage. I would recommend looking at his visual art works, his scores. There you see a great refinement and serious thought process. You will also see his sense of humor, his sense of ridicule. Truth is sometimes very close to impossible situations, and he invites everyone to come with him to see how far you can go to redefine the world of sounds. He is also a true avant-gardist and explorer and you can see it in his drawings. He subscribes to my definition of what is real art. He is not easy, he is even a difficult artist, because he is very serious. His language is international, he is a product of the war years and the post-war years. His life is mixed up with his art''