A novel determination of non-perturbative contributions to Bjorken sum rule Qing Yu, Xing-Gang Wu, Hua Zhou and Xu-Dong Huang Eur. Phys. J. C, 81 8 (2021) 690 Published online: 03 August 2021 DOI: 10.1140/epjc/s10052-021-09495-w