Bound states of a quartic and sextic inverse-power-law potential for all angular momenta A. D. Alhaidari, I. A. Assi and A. Mebirouk Eur. Phys. J. Plus, 136 4 (2021) 443 Published online: 25 April 2021 DOI: 10.1140/epjp/s13360-021-01424-w