共 15 条
[12]
KOTITZ G, 1970, THESIS FRIEDRICH SCH
[13]
OPTICAL STUDIES OF A PHOTOCHROMIC COLOR CENTER IN RARE-EARTH-DOPED CAF2
[J].
PHYSICAL REVIEW B-SOLID STATE,
1971, 3 (02)
:516-+
[15]
ULLMANN P, 1969, THESIS FRIEDRICH SCH