Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 1 > 68-76
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 3 > 286-290
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 9 > 800-807