Mechanics of Materials - Beer and Johnston, Mc Graw Hill 1981
webliography
- http://en.wikipedia.org/wiki/Flywheel_energy_storage
- http://orbitalvector.com/Power/Flywheel%20Batteries/FLYWHEEL%20BATTERIES.htm
- http://www.electrical4u.com/what-is-braking-types-of-braking-regenerative-plugging-dynamic-braking/