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Submitted on: 03 December 2018.
Revised on: 06 January 2019.
Accepted on: 13 February 2019.
___________________ENTRE CIENCIA E INGENIERIA---UNIV CATOLICA PEREIRA
Submitted on: 18 June 2003.
Revised on: 24 September 2003.
Accepted on: 22 November 2003.
___________________ENTRE CIENCIA E INGENIERIA---UNIV CATOLICA PEREIRA
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Submitted on: 13 January 2009.
Revised on: 11 February 2009.
Accepted on: 02 March 2009.
___________________ENTRE CIENCIA E INGENIERIA---UNIV CATOLICA PEREIRA
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http://reply.papertrans.cn/1/86/8536/8536-28.png
Submitted on: 31 July 2015.
Revised on: 06 November 2015.
Accepted on: 23 December 2015.
___________________ENTRE CIENCIA E INGENIERIA---UNIV CATOLICA PEREIRA
Submitted on: 15 October 2020.
Revised on: 16 January 2021.
Accepted on: 01 March 2021.
___________________ENTRE CIENCIA E INGENIERIA---UNIV CATOLICA PEREIRA