Integration of the Lane–Emden equation for relativistic anisotropic polytropes through gravitational decoupling: a novel approachD. Santana, E. Fuenmayor and E. ContrerasEur. Phys. J. C, 82 8 (2022) 703DOI: https://doi.org/10.1140/epjc/s10052-022-10683-5