@inbook{Einstein+1956+52+54,
url = {https://doi.org/10.1515/9783112596029-020},
title = {§ 19. Das Gravitationsfeld},
booktitle = {Über die spezielle und die allgemeine Relativitätstheorie},
author = {A. Einstein},
publisher = {De Gruyter},
address = {Berlin, Boston},
pages = {52--54},
doi = {doi:10.1515/9783112596029-020},
isbn = {9783112596029},
year = {1956},
lastchecked = {2026-05-07}
}