Fermion and graviton in Dirac–Born–Infeld braneworld models Esmaeil Mazani, Ali Tofighi and Masoumeh Moazzen Sorkhi Eur. Phys. J. C, 80 3 (2020) 267 Published online: 24 March 2020 DOI: 10.1140/epjc/s10052-020-7826-9