Novel modified gravity braneworld configurations with a Lagrange multiplier Dionisio Bazeia, D. A. Ferreira, Francisco S. N. Lobo and João Luís Rosa Eur. Phys. J. Plus, 136 3 (2021) 321 Published online: 17 March 2021 DOI: 10.1140/epjp/s13360-021-01304-3