Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 8 > 746-747
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 8 > 703-706
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 13 > 1174-1178
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 13 > 1183-1187