Submitted on: 14 February 2006.
Revised on: 11 March 2006.
Accepted on: 28 March 2006.
Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B
Submitted on: 31 December 2020.
Revised on: 29 January 2021.
Accepted on: 22 February 2021.
Physics and Chemistry of Glasses-European Journal of Glass Science and Technology Part B
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