Electron Paramagnetic Resonance spectroscopy by Calle, C, Eichel, R, Finazzo, C, Forrer, J, Granwehr, J, Gromov, I, Groth, W, Harmer, J, Kalin, M, Lammler, W, Liesum, L, Madi, Z, Stoll, S, Van Doorslaer, S, Schweiger, A