Rm. Avakian et G. Oganessyan, A NEW FORMULA FOR THE MASS OF A STATIONARY AXISYMMETRICAL CONFIGURATION, Modern physics letters A, 10(10), 1995, pp. 841-844
It has been shown by one of the authors(1) that in isotropic spherical
coordinates there is a relation between the mass of a static spherica
l gravitating body and the pressure distribution inside it. In this pa
per the result is generalized for the case of stationary axisymmetric
configurations.