Dynamics of distributed-order hyperchaotic complex van der Pol oscillators and their synchronization and controlGamal M. Mahmoud, Ahmed A. Farghaly, Tarek M. Abed-Elhameed, Shaban A. Aly and Ayman A. ArafaEur. Phys. J. Plus, 135 1 (2020) 32DOI: https://doi.org/10.1140/epjp/s13360-019-00006-1