Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 8 > 684-688
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 18 > 1631-1634
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 21 > 1988-1993