1. Vibration Problems in Engineering;Timoshenko,1955
2. The spring–mass system revisited;Cushing;American Journal of Physics,1984
3. Free vibrations of helical springs;Jiang;ASME Journal of Applied Mechanics,1991
4. The oscillation of a loaded spring;Champion;The Mathematical Scientist,2003
5. New spring formulas and new materials for precision scales;Sayre;Transactions of ASME,1936