Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 4 > 339-346
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 6 > 575-580
Optik - International Journal for Light and Electron Optics > 2010 > 121 > 18 > 1680-1683