Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 7 > 594-603
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 8 > 731-734
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 21 > 1923-1927