Engelhardt, H., Baeck, W., Zartner, A., & et al. (1980). A Novel Momentum-Resolving Multichanneling Electron and Ion Spectrometer: 4.Internat.Conf.on Solid Surfaces and 3.Europ.Conf.on Surface Science. Le Vide, les Couches Minces. Suppl., 102, 1119.