Sosnitskii, S. P. “On the Instability of Lagrange Solutions in the Three-Body Problem”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 11 (November 25, 1996): 1580-1585. Accessed May 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5214.