* Timoshenko, S. P. ( 1953 ) History of Strength of Materials, pp126 – 129
* Timoshenko, S. P. ( 1953 ) History of Strength of Materials, pp182 – 183, ISBN 0-486-61187-6
0.016 seconds.
* Timoshenko, S. P. ( 1953 ) History of Strength of Materials, pp126 – 129
* Timoshenko, S. P. ( 1953 ) History of Strength of Materials, pp182 – 183, ISBN 0-486-61187-6
0.016 seconds.