Brennan, M. J.; Kovacic, I.; Carrella, A.; Waters, T. P. (2008). "On the jump-up and jump-down frequencies of the Duffing oscillator". Journal of Sound and Vibration. 318 (4–5): 1250–1261. Bibcode:2008JSV...318.1250B. doi:10.1016/j.jsv.2008.04.032.
Tajaddodianfar, F.; Yazdi, M. R. H.; Pishkenari, H. N. (2016). "Nonlinear dynamics of MEMS/NEMS resonators: analytical solution by the homotopy analysis method". Microsystem Technologies. 23 (6): 1913–1926. doi:10.1007/s00542-016-2947-7. S2CID113216381.
Brennan, M. J.; Kovacic, I.; Carrella, A.; Waters, T. P. (2008). "On the jump-up and jump-down frequencies of the Duffing oscillator". Journal of Sound and Vibration. 318 (4–5): 1250–1261. Bibcode:2008JSV...318.1250B. doi:10.1016/j.jsv.2008.04.032.
Lifshitz, R.; Cross, M. C. (2008). "Nonlinear mechanics of nanomechanical and micromechanical resonators". In Schuster, H. G. (ed.). Reviews of Nonlinear Dynamics and Complexity. Wiley. pp. 8–9. ISBN9783527407293. LCCN2008459659.
Tajaddodianfar, F.; Yazdi, M. R. H.; Pishkenari, H. N. (2016). "Nonlinear dynamics of MEMS/NEMS resonators: analytical solution by the homotopy analysis method". Microsystem Technologies. 23 (6): 1913–1926. doi:10.1007/s00542-016-2947-7. S2CID113216381.