Friedmann, A. (1922) Uber die Krummung des Raumes. Zeitschrift fur Physik, 10, 377-386. English Trans. (1999) On the Curvature of Space. General Relativity and Gravitation, 31, 1991-2000.
http://www.ymambrini.com/My_World/History_files/Friedman_1922.pdf
https://doi.org/10.1023/A:1026751225741

has been cited by the following article:

• TITLE: A Short Discussion on the Gravitational Redshift in the Light of an Alleged Local Variability of the Planck Constant

  AUTHORS: Carmine Cataldo

  KEYWORDS: Gravitational Redshift, Variable Planck Constant, Absoluteness of Time

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.5 No.5, May 12, 2017

  ABSTRACT: The aim of this paper fundamentally lies in proposing an alternative explanation to the so-called gravitational redshift. The above-mentioned phenomenon, experimentally verified more than half a century ago, is commonly legitimised by means of Special Relativity. In our case, since time is considered as being absolute, we simply postulate a local variability of the Plank constant. Ultimately, we carry out an alternative deduction of the relation that expresses the gravitational redshift as a function of a parameter that, in our case, does not coincide with a Schwarzschild coordinate.