Weyl invariance, non-compact duality and conformal higher-derivative sigma models Darren T. Grasso, Sergei M. Kuzenko and Joshua R. Pinelli Eur. Phys. J. C, 83 3 (2023) 206 Published online: 09 March 2023 DOI: 10.1140/epjc/s10052-023-11373-6