Acceptability conditions and relativistic anisotropic generalized polytropes Daniel Suárez-Urango, Justo Ospino, Héctor Hernández and Luis A. Núñez Eur. Phys. J. C, 82 2 (2022) 176 Published online: 25 February 2022 DOI: 10.1140/epjc/s10052-022-10119-0