1. On Heroes and Hero Worship and the Heroic in History;Carlyle;Project Guttenburg,1841
2. Rupture of the intervertebral disc with involvement of the spinal canal;Mixter;New Eng J Med,1934
3. Hamlet;Shakespeare,1604
4. www.classicmarine.co.uk/Articles/masts.htm (letzter Zugriff: 15. Juli 2010)
5. Structures, or Why Things Don't Fall Down;Gordon,1978