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Gerrit Green and Ragnar Fleischmann, "Branched flow and caustics in nonlinear waves," New Journal of Physics 21 (8), 083020 (2019).

George Datseris, Theo Geisel, and Ragnar Fleischmann, "Robustness of ballistic transport in antidot superlattices," New Journal of Physics 21 (4), 043051 (2019).

George Datseris and Ragnar Fleischmann, "Husimi function for electrons moving in magnetic fields", (2019), pp. 7.