Hofmann, J. V. Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society;
Hofmann, J. V. (1996). W7-X Spectroscopy. In J. Winter (Ed.), Koordinationsgespräche KFA-W7X (pp. 80-94). Jülich: Forschungszentrum Jülich KFA.