http://en.wikipedia.org/wiki/Hanns_Eisler
http://go20ccm.tripod.com/hechronik.htm
_ Eisler - Piano Sonata No. 3; I Viertel
https://www.youtube.com/watch?v=vbEpuo5hBg4
_ Hanns Eisler: Kleine Sinfonie op.29 (1931/1932)
https://www.youtube.com/watch?v=9ykNiClDVu0
