1. Truly nonlinear oscillations: harmonic balance, parametric expansions, iteration, and averaging methods;Mickens,2010
2. Handbook of elliptic integrals for engineers and physicists;Byrd,1954
3. Jacobi elliptic functions: a review of nonlinear oscillatory application problems;Kovacic;J Sound Vib,2016
4. Approximations for motion of the oscillators with a non-negative real-power restoring force;Rakaric;J Sound Vib,2011
5. On the use of special functions for studying truly nonlinear conservative oscillators;Kovacic,2014