Characterization of standard clocks by means of light rays and freely falling particles
A mathematical description of standard clocks in Weyl manifolds is given. Then a method is exhibited to test wether or not a given clock is a standard one. This method only uses light rays and free falling particles, and therefore this approach is in accordance with the Ehlers- Pirani-Schild axioms.
scientific article; zbMATH DE number 4034596