Effect of alkali metal oxides on upconversion fluorescence properties�
of germanate-tellurite glasses
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2003 ◽
Vol 107
(29)
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pp. 5617-5630
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1988 ◽
Vol 146
(2)
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pp. 243-247
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1973 ◽
Vol 77
(8)
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pp. 1065-1073
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2010 ◽
Vol 4
(1)
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pp. 20-28
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