Application of the "Mathematica" computer system to the determination of the coordinates of equilibrium positions in the Grebenikov - Elmabsut gravitation model of four bodies. НК [Internet]. 1999 Mar. 29 [cited 2026 Jan. 22];2(1):16-8. Available from: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/35