Relativistic theory of gravitation and the graviton rest mass

A graviton rest mass $m$ is introduced in the framework of the relativistic theory of gravitation and equations describing a massive gravitational field are obtained. Under the assumption that the entire “hidden mass” of the matter in the Universe is due to the existence of a massive gravitational field, an upper bound on the rest mass is obtained: $m\leqslant 0,64\cdot 10^{-65}$ g.