The relativistic and direct solar radiation pressure effects on an axially symmetric spacecraft. I. The Hamiltonian and the canonical equations of motion. - M. I. El-Saftawy; Ahmed A. El-Enna (Appl. Math. Comput., 2002)

Analytical treatment of the Earth oblateness and solar radiation pressure effects on an artificial satellite I. The equations of motion. - Ahmed A. El-Enna (Appl. Math. Comput., 2003)

The joint effect of relativistic and direct solar radiation pressure on an axially symmetric spacecraft.: II. The solution and the elements of transformation. - Ahmed A. El-Enna; M. I. El-Saftawy (Appl. Math. Comput., 2003)

Analytical treatment of the earth oblateness and solar radiation pressure effects on an artificial satellite: II–The solution. - Ahmed A. El-Enna (Appl. Math. Comput., 2004)

The equations of motion of the joint effects of the relativistic and solar radiation pressure on an earth artificial satellite. - Ahmed A. El-Enna (Appl. Math. Comput., 2004)

Analytical treatment of the relativistic and solar radiation pressure effects on an artificial satellite. - Ahmed A. El-Enna; M. K. Ahmed; Fawzy Ahmed Abd El-Salam (Appl. Math. Comput., 2006)