Regge-like relation and a universal description of heavy–light systemsKan Chen, Yubing Dong, Xiang Liu, Qi-Fang Lü and Takayuki MatsukiEur. Phys. J. C, 78 1 (2018) 20DOI: https://doi.org/10.1140/epjc/s10052-017-5512-3