Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 3 > 281-285
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 10 > 897-902
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 21 > 1959-1961