Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 5 > 429-434
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 21 > 1922-1926
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 22 > 2058-2062
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 23 > 2129-2135