Schumacher, U. Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;
Boileau, A., Schumacher, U., & et al. (1987). Present Results of Charge Exchange Recombination Spectroscopy on JET and Prospects for Future Alpha Particle Diagnostics: 14.European Conference. Controlled Fusion and Plasma Physics, Part 3, 11D, 3, 1260-1263.