Submitted on: 17 March 2012.
Revised on: 12 April 2012.
Accepted on: 04 May 2012.
OPTICA APPLICATA
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http://reply.papertrans.cn/3/238/23703/23703-33.png
Submitted on: 27 August 1998.
Revised on: 27 September 1998.
Accepted on: 19 October 1998.
OPTICA APPLICATA
http://reply.papertrans.cn/3/238/23703/23703-35.png
Submitted on: 30 June 2001.
Revised on: 20 July 2001.
Accepted on: 15 August 2001.
OPTICA APPLICATA