Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 16 > 1462-1465
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 23 > 2075-2077
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 23 > 2078-2082