http://reply.papertrans.cn/2/184/18337/18337-31.png
Submitted on: 22 January 1998.
Revised on: 17 February 1998.
Accepted on: 12 April 1998.
___________________Journal of Non-Crystalline Solids
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Submitted on: 21 February 2021.
Revised on: 20 June 2021.
Accepted on: 06 August 2021.
___________________Journal of Non-Crystalline Solids
Submitted on: 11 April 2011.
Revised on: 15 June 2011.
Accepted on: 15 July 2011.
___________________Journal of Non-Crystalline Solids
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