I in generalized supergravity T. Araujo, E. Ó Colgáin, J. Sakamoto, M. M. Sheikh-Jabbari and K. Yoshida Eur. Phys. J. C, 77 11 (2017) 739 Published online: 06 November 2017 DOI: 10.1140/epjc/s10052-017-5316-5