Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 2 > 181-184
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 5 > 417-421
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 13 > 1146-1148
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 16 > 1465-1468
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 21 > 1988-1992