Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 2 > 99-104
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 5 > 407-410
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 11 > 1000-1004