Two-photon spectroscopy of rare-earth ions in crystals
1984 ◽
Vol 40
(6)
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pp. 684-688
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Keyword(s):
2014 ◽
Vol 1015
◽
pp. 566-569
Keyword(s):
Keyword(s):
1980 ◽
Vol 32
(4)
◽
pp. 403-408
◽
2016 ◽
Vol 660
◽
pp. 226-230
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