Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 10 > 903-907
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 16 > 1478-1486
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 23 > 2162-2165