52. Y. Gu, M.Y. Weng, G.F. Teng, H. Zeng, J.S. Jie, W.J. Xiao, J.X. Zheng*, F. Pan*, "Tuning polaronic redox behavior in olivine phosphate", Phys. Chem. Chem. Phys. 2019, 21, 4578-4583.