Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2014 > 125 > 1 > 349-352
Optik - International Journal for Light and Electron Optics > 2014 > 125 > 1 > 532-535
Optik - International Journal for Light and Electron Optics > 2014 > 125 > 5 > 1663-1666
Optik - International Journal for Light and Electron Optics > 2014 > 125 > 12 > 2875-2879
Optik - International Journal for Light and Electron Optics > 2014 > 125 > 12 > 2835-2839