%0 Journal Article %J Physical Review D %D 2021 %T Constraints on non-Einsteinian black-hole charges with the 2019 EHT observations of M87 %A Prashant Kocherlakota %A Luciano Rezzolla %A Event Horizon Telescope Collaboration %B Physical Review D %V 103 %P 40-47 %8 2020 %G eng %U https://journals.aps.org/prd/abstract/10.1103/PhysRevD.103.104047 %N 10