Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 2 > 162-167
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 3 > 190-197
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 24 > 2227-2229