New observational constraints on f(T) cosmology from radio quasars Jing-Zhao Qi, Shuo Cao, Marek Biesiada, Xiaogang Zheng and Zong-Hong Zhu Eur. Phys. J. C, 77 8 (2017) 502 Published online: 28 July 2017 DOI: 10.1140/epjc/s10052-017-5069-1