%0 Journal Article
%A et D. Psaltis al.
%B Physical Review Letters
%D 2020
%G eng
%N 14
%P 141104
%T Gravitational Test beyond the First Post-Newtonian Order with the Shadow of the M87 Black Hole
%U https://ui.adsabs.harvard.edu/abs/2020PhRvL.125n1104P/abstract
%V 125