http://www.artcyclopedia.com/artists/klee_paul.html
_ Michael Gaumnitz : Paul Klee The Silence of the Angel (2005)
https://youtu.be/px5parLTj4M
_ PINTORES (Paul Klee) 1879-1940
https://youtu.be/ueEZQ1yRrlU
_ Who Was Paul Klee?
https://youtu.be/Nq9oBYgkxaw
