GadomskiiL. Ya., GrebenikovE. A., Gurskaya A. R., and ZemtsovaN. I. 1998. “New Classes of Exact Solutions for a Problem of Many Bodies That Attract One Another According to an Arbitrary Law Depending on the Distances Between Bodies”. Ukrains’kyi Matematychnyi Zhurnal 50 (3), 329–337. https://umj.imath.kiev.ua/index.php/umj/article/view/4934.