Dynamical 4-D Gauss-Bonnet action from matter-graviton interaction at one-loop Susobhan Mandal and S. Shankaranarayanan Eur. Phys. J. Plus, 140 2 (2025) 97 Published online: 03 February 2025 DOI: 10.1140/epjp/s13360-025-06037-1