Exact solutions of the generalized Klein–Gordon oscillator in a global monopole space-time Marc de Montigny, Hassan Hassanabadi, James Pinfold and Soroush Zare Eur. Phys. J. Plus, 136 7 (2021) 788 Published online: 31 July 2021 DOI: 10.1140/epjp/s13360-021-01786-1