A new class of planar differential systems with hyperbolic algebraic limit cycles. Nonlinear Studies, [S. l.], v. 33, n. 3, p. 1031–1038, 2026. Disponível em: https://www.nonlinearstudies.com/index.php/nonlinear/article/view/4378. Acesso em: 1 sep. 2026.