Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2001 > 112 > 1 > 26-30
Optik - International Journal for Light and Electron Optics > 2001 > 112 > 6 > 245-249
Optik - International Journal for Light and Electron Optics > 2001 > 112 > 9 > 407-412