On the resonances near the continua boundaries of the Dirac equation with a short-range interaction K. S. Krylov, V. D. Mur and A. M. Fedotov Eur. Phys. J. C, 80 3 (2020) 270 Published online: 26 March 2020 DOI: 10.1140/epjc/s10052-020-7833-x