Non-Keplerian behavior and instability of motion of two bodies caused by a finite velocity of gravity. Neliniini Kolyvannya, [S. l.], v. 21, n. 3, p. 397–419, 2018. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/917. Acesso em: 8 dec. 2025.