Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2001 > 112 > 2 > 62-66
Optik - International Journal for Light and Electron Optics > 2001 > 112 > 3 > 119-124
Optik - International Journal for Light and Electron Optics > 2001 > 112 > 11 > 541-543