Generalized 11D supergravity equations from tri-vector deformations Ilya Bakhmatov, Aybike Çatal-Özer, Nihat Sadik Deger, Kirill Gubarev and Edvard T. Musaev Eur. Phys. J. C, 83 1 (2023) 37 Published online: 18 January 2023 DOI: 10.1140/epjc/s10052-022-11163-6