6 citations · 16 across the 14 of their papers we have counts for
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gr-qc2009★ 2 cited
About the mass problem
Ll. Bel, J. Martin-Martin
The concept of {\it active gravitational mass}, its definition and its relation with the sources of a gravitational field, was clearly established by Tolman in 1934. On the contrar…
physics.class-ph2009
Evanescent gravitational mass
Lluis Bel
A simple and {\it innocent} modification of Poisson's equation leads to a modified Newtonnian theory of gravitation where a localized and {\it positive} energy density of the gravi…