Submitted on: 09 May 2014.
Revised on: 29 May 2014.
Accepted on: 08 June 2014.
Nexo Revista Cientifica---UNIV NACL INGENIERIA
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Submitted on: 14 December 2007.
Revised on: 02 January 2008.
Accepted on: 26 January 2008.
Nexo Revista Cientifica---UNIV NACL INGENIERIA
Submitted on: 05 July 1999.
Revised on: 08 August 1999.
Accepted on: 22 August 1999.
Nexo Revista Cientifica---UNIV NACL INGENIERIA
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Submitted on: 08 February 2019.
Revised on: 15 March 2019.
Accepted on: 09 April 2019.
NULL
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Submitted on: 11 January 2009.
Revised on: 13 February 2009.
Accepted on: 22 February 2009.
Nexo Revista Cientifica---UNIV NACL INGENIERIA
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