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Submitted on: 08 June 2008.
Revised on: 17 July 2008.
Accepted on: 03 August 2008.
OPTICS AND SPECTROSCOPY---PLEIADES PUBLISHING INC
Submitted on: 07 November 2016.
Revised on: 06 December 2016.
Accepted on: 11 December 2016.
OPTICS AND SPECTROSCOPY
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