Exper.Astron. Exper.Astron., 2021, 52 (3), pp.407-437. ⟨10.1007/s10686-021-09764-2⟩ Experimental Astronomy Rosati, P, Basa, S, Blain, A W, Bozzo, E, Branchesi, M, Christensen, L, Ferrara, A, Gomboc, A, O'Brien, P T, Osborne, J P, Rossi, A, Schussler, F, Spurio, M, Stergioulas, N, Stratta, G, Amati, L, Casewell, S, Ciolfi, R, Ghirlanda, G, Grimm, S, Guetta, D, Harms, J, Le Floc'h, E, Longo, F, Maggiore, M, Mereghetti, S, Oganesyan, G, Salvaterra, R, Tanvir, N R, Turriziani, S, Vergani, S D, Balman, S, Caruana, J, Erkut, M H, Guidorzi, G, Frontera, F, Martin-Carrillo, A, Paltani, S, Porquet, D & Sergijenko, O 2021, ' Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities ', Experimental Astronomy, vol. 52, pp. 407-437 . https://doi.org/10.1007/s10686-021-09764-2