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Optik - International Journal for Light and Electron Optics > 2013 > 124 > 21 > 4943-4946
Journal of Non-Crystalline Solids > 2011 > 357 > 11-13 > 2358-2361
Optik - International Journal for Light and Electron Optics > 2013 > 124 > 21 > 4943-4946
Journal of Non-Crystalline Solids > 2011 > 357 > 11-13 > 2358-2361