Einstein, A. (1939) On a Stationary System with Spherical Symmetry Consisting of Many Gravitating Masses. The Annals of Mathematics, 40, 922-936.
http://old.phys.huji.ac.il/~barak_kol/Courses/Black-holes/reading-papers/Einstein1939.pdf
https://doi.org/10.2307/1968902

has been cited by the following article:

• TITLE: Dark Stars: Supermassive and Ultramassive Dark Macroobjects

  AUTHORS: Vladimir S. Netchitailo

  KEYWORDS: World-Universe Model, Dark Stars, Superclusters, Multicomponent Dark Matter, Explosive Volcanic Rotational Fission, Angular Momentum, JWST Discoveries

  JOURNAL NAME: Journal of High Energy Physics, Gravitation and Cosmology, Vol.9 No.4, September 28, 2023

  ABSTRACT: R. Genzel and A. Ghez were awarded the 2020 Nobel Prize in Physics for their discovery that Sgr A* is a supermassive compact object, for which Supermassive Black Hole (SBH) was the only accepted explanation. In 2013, we proposed a principally different explanation of supermassive compact objects: “Macroobjects of the World have cores made up of the discussed DM particles. Other particles, including DM and baryonic matter, form shells surrounding the cores” [1]. According to the developed Hypersphere World-Universe Model (WUM), the World consists of Dark Matter (about 92.8% of the total Matter) and Ordinary matter (about 7.2%). It means that Dark Matter (DM) should play the main role in any Cosmological model. It is the case in WUM, and Ordinary matter is a byproduct of Dark Matter Particles (DMPs) self-annihilation. In present paper, we discuss Dark Stars, Supermassive and Ultramassive Dark Macroobjects in frames of WUM.