Dynamical study of a chaotic predator-prey model with an omnivoreA. Al-khedhairi, A. A. Elsadany, A. Elsonbaty and A. G. AbdelwahabEur. Phys. J. Plus, 133 1 (2018) 29DOI: https://doi.org/10.1140/epjp/i2018-11864-8