Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 12 > 1069-1072
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 23 > 2083-2085
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 24 > 2216-2219