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Physica E: Low-dimensional Systems and Nanostructures > 2009 > 41 > 6 > 1127-1129
IEEE Journal of Selected Topics in Quantum Electronics > 2006 > 12 > 6-2 > 1607 - 1617
Optical Materials > 2004 > 25 > 2 > 141-147
Optical Materials > 2001 > 16 > 4 > 463-473
Electronics Letters > 1991 > 27 > 11 > 993 - 995