The two-channel exotic charmonium-like resonances in the mass region (3900–4700) MeV A. M. Badalian and Yu. A. Simonov Eur. Phys. J. C, 82 11 (2022) 1024 Published online: 15 November 2022 DOI: 10.1140/epjc/s10052-022-11006-4