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
Journal of Non-Crystalline Solids, vol. 358, no. 5, page. 921 - 924, 2012-03-01