Relativistic description of asymmetric fully heavy tetraquarks in the diquark–antidiquark model V. O. Galkin and E. M. Savchenko Eur. Phys. J. A, 60 5 (2024) 96 Published online: 03 May 2024 DOI: 10.1140/epja/s10050-024-01311-9