Singh, Jagadish, and Tyokyaa K. Richard. “The Motion of a Test Particle Around the Out-of-Plane Libration Points in the ER3BP With Oblateness up to Zonal Harmonics J_4”. International Astronomy and Astrophysics Research Journal 2, no. 1 (October 14, 2020): 209–223. Accessed October 4, 2026. https://journaliaarj.com/index.php/IAARJ/article/view/28.