Coexisting attractors and basins of attraction of an extended forced Duffing oscillator Isabelle da L. Soares, Marcelo F. Krol and Paulo C. Rech Eur. Phys. J. B, 97 6 (2024) 71 Published online: 07 June 2024 DOI: 10.1140/epjb/s10051-024-00709-0