A new megastable chaotic oscillator with singularity Zhen Wang, Hamid Reza Abdolmohammadi, Mingshu Chen, Agnieszka Chudzik, Sajad Jafari and Iqtadar Hussain Eur. Phys. J. Special Topics, 229 12-13 (2020) 2341-2348 Published online: 28 September 2020 DOI: 10.1140/epjst/e2020-000003-6