Stability in quadratic torsion theoriesTeodor Borislavov Vasilev, Jose A. R. Cembranos, Jorge Gigante Valcarcel and Prado Martín-MorunoEur. Phys. J. C, 77 11 (2017) 755DOI: https://doi.org/10.1140/epjc/s10052-017-5331-6