Optical properties of Pr3+-doped silica gel and glass monoliths
1996 ◽
Vol 90
(2)
◽
pp. 461-468
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1994 ◽
Vol 176
(2-3)
◽
pp. 172-178
◽
2005 ◽
Vol 27
(12)
◽
pp. 1819-1824
◽