Chaos in a memristive oscillator with six lines of equilibriaJanarthanan Ramadoss, Christos Volos, Viet-Thanh Pham, Karthikeyan Rajagopal and Iqtadar HussainEur. Phys. J. Spec. Top., 231 16-17 (2022) 3059-3065DOI: https://doi.org/10.1140/epjs/s11734-022-00555-0