MA Hamdy, SM Saad, W. H. Elsanhoury, SA Gabriel and NE Kassem, “Physical parameters of stellar interior model”, The eighth general scientific meeting (NRIAG), November pp. 11–15, 2000. M. A. Sharaf, M. A. Hamdy, M. I. Nouh, S. M. Saad and W. H. Elsanhoury , “Approximate Series Solution for the Physical Parameters of Polytropic and Isothermal Gas Spheres” , NRIAG Journal of Astronomy and Astrophysics , Vol. 2, No. 1, pp. 13–26, 2003. M. A. Sharaf, W. H. Elsanhoury , M. I. Nouh, A. S. Saad, M. A. Hamdy, and M. M. Eloker “Relation Between the Tangential Velocity and the Angular Distance to the Vertex for Hyades Stars” , NRIAG Journal of Astronomy and Astrophysics , 2006. W. H. Elsanhoury , M. A...