Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 5 > 459-463
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 14 > 1258-1261
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 21 > 1881-1884