Invariant Manifolds of Degenerate Tori and Double Parabolic Orbits to Infinity in the (n + 2)-Body Problem

I. Baldomá, E. Fontich, P. Martín, Arch. Rational Mech. Anal. (2024) 248:52, 94pp, https://doi.org/10.1007/s00205-024-01995-9