Impedance modelling and collective effects in the Future Circular e+e− Collider with 4 IPs M. Migliorati, C. Antuono, E. Carideo, Y. Zhang and M. Zobov EPJ Techn Instrum, 9 1 (2022) 10 Published online: 25 August 2022 DOI: 10.1140/epjti/s40485-022-00084-z