D O C . 5 4 A D D I T I O N T O G E N E R A L R E L AT I V I T Y 4 1 1
54. “On a Natural Addition to the Foundation
of the General Theory of Relativity”
[Einstein 1921e]
Submitted 3 March 1921
Published 17 March 1921
In: Königlich Preußische Akademie der Wissenschaften (Berlin). Sitzungsberichte (1921):
261–264.