JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 391, page. 39 - 42, 2014-05-01
Journal of Luminescence, vol. 147, page. 209 - 215, 2014-03
JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 387, page. 76 - 78, 2014-03-01
JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 383, page. 173 - 175, 2014-01-01