Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2013 > 124 > 18 > 3340-3344
Optik - International Journal for Light and Electron Optics > 2013 > 124 > 22 > 5727-5731
Optik - International Journal for Light and Electron Optics > 2013 > 124 > 24 > 6651-6656