[1]
GadomskiiL. Y., GrebenikovE. A., Gurskaya A. R., and ZemtsovaN. I., “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”, Ukr. Mat. Zhurn., vol. 50, no. 3, pp. 329–337, Mar. 1998.