Equilibrium points and surface dynamics about comet 67P/Churyumov–GerasimenkoLeonardo Braga, Andre Amarante, Alessandra Ferreira, Caio Gomes and Luis CerantoEur. Phys. J. Spec. Top., 234 25 (2026) 7765-7785DOI: https://doi.org/10.1140/epjs/s11734-025-01986-1