https://physicsessays.org/browse-journal-2/product/656-16-mendel-sachs-on-the-rotation-of-galaxies-from-general-relativity.html
16. Mendel Sachs, On the Rotation of Galaxies from General Relativity - Physics Essays Publication
International journal dedicated to theoretical and experimental aspects of fundamental problems in Physics and, generally, to the advancement of basic...
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