A memristive chaotic system with offset-boostable conditional symmetry Tianai Lu, Chunbiao Li, Xiong Wang, Changyuan Tao and Zuohua Liu Eur. Phys. J. Special Topics, 229 6-7 (2020) 1059-1069 Published online: 26 March 2020 DOI: 10.1140/epjst/e2020-900186-5