1. Amit Mittal, Ahmad, I. and Bhatnagar, K.B. (2008): Periodic orbits generated by Lagrangian solutions of the restricted three body problem when one of the primaries is an oblate body. Astrophy. and Space Sci. New York, Vol. 319, page 63-73.
2. Amit Mittal, Ahmad, I. and Bhatnagar, K.B. (2009): Periodic orbits in the photogravitational restricted problem with the smaller primary an oblate body. Astrophy. and Space Sci. New York, Vol. 323, page 65-73.
3. Amit Mittal, Ahmad, I. and Bhatnagar, K.B. (2009): Periodic orbits generated by Lagrangian solutions of the restricted three body problem when both the primaries are triaxial rigid bodies. Invertis Journal of Science and Technology, India Vol. 3, No. 3, page 157-168.
4. Amit Mittal, Ahmad, I. and Bhatnagar, K.B. (2009): Periodic orbits generated by Lagrangian solutions of the restricted three body problem when both the primaries are oblate bodies. GPM Journal of Management and Technology, India Vol. 2, No. 1, page 77-88.
5. Amit Mittal, Rajiv, Aggarwal and Bhatnagar, K.B. (2010): Periodic Orbits around L4 in the Photogravitational Restricted Problem with Oblate Primaries. Proceedings of the 5th WSEAS International Conference on OPTICS-ASTROPHYSICS-ASTRONOMY (ICOAA '10), University of Cambridge, UK, page 195.