Cation Dynamics in Mixed-Cation (MA)<sub><i>x</i></sub>(FA)<sub>1–<i>x</i></sub>PbI<sub>3</sub> Hybrid Perovskites from Solid-State NMRDominik J. Kubicki, Lyndon Emsley, Shaik M. Zakeeruddin et al.|Journal of the American Chemical Society|2017Cited by 251