Links:
[1] http://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/node/3444
[3] http://www.mpim-bonn.mpg.de/node/3651
[4] http://www.mpim-bonn.mpg.de/sites/default/files/videos/download/Hirzebruch_20120423.p1.mp4
[5] http://www.mpim-bonn.mpg.de/sites/default/files/videos/download/Hirzebruch_20120423.p1.webm