Constant curvature 3-branes in 5-D f(R) bulk Shafaq Gulzar Elahi, Soumya Samrat Mandal and Soumitra SenGupta Eur. Phys. J. Plus, 140 5 (2025) 417 Published online: 20 May 2025 DOI: 10.1140/epjp/s13360-025-06243-x