Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 3 > 193-196
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 4 > 329-332
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 11 > 971-973
Optik - International Journal for Light and Electron Optics > 2012 > 123 > 18 > 1623-1626