Inbound evolution of 21 long period comets. - Bertini, Ivano; Fulle, M; Mazzotta Epifani, E; Fiscale, S; Inno, L; Rotundi, A; Tubiana, C; Della Corte, V; Ferrigno, F; Magliano, C (Monthly Notices of the Royal Astronomical Society, 2026)