Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 2 > 177-181
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 7 > 650-651
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 20 > 1862-1864