Optik - International Journal for Light and Electron Optics
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 2 > 173-176
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 17 > 1535-1537
Optik - International Journal for Light and Electron Optics > 2011 > 122 > 19 > 1719-1722