Foucar, Lutz Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
http://dx.doi.org/10.1063/1.4754470 (Any fulltext)
Wallauer, R., Voss, S., Foucar, L., Bauer, T., Schneider, D., Titze, J., et al. (2012). Momentum spectrometer for electron-electron coincidence studies on superconductors. Review of Scientific Instruments, 83(10): 103905, pp. 1-7. doi:10.1063/1.4754470.