Submitted on: 18 March 2018.
Revised on: 17 April 2018.
Accepted on: 31 May 2018.
___________________Journal of Infrared Millimeter and Terahertz Waves
Submitted on: 15 June 2017.
Revised on: 20 July 2017.
Accepted on: 28 August 2017.
___________________Journal of Infrared Millimeter and Terahertz Waves
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Submitted on: 25 June 2013.
Revised on: 19 August 2013.
Accepted on: 25 September 2013.
___________________Journal of Infrared Millimeter and Terahertz Waves
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Submitted on: 23 August 2009.
Revised on: 21 October 2009.
Accepted on: 23 November 2009.
___________________Journal of Infrared Millimeter and Terahertz Waves
Submitted on: 05 January 1998.
Revised on: 11 April 1998.
Accepted on: 19 May 1998.
___________________Journal of Infrared Millimeter and Terahertz Waves