Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 9 > 788-792
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 10 > 867-871
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 17 > 1550-1557
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 21 > 1955-1958