Submitted on: 26 November 2008.
Revised on: 25 December 2008.
Accepted on: 20 January 2009.
Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia
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Submitted on: 03 April 2020.
Revised on: 08 May 2020.
Accepted on: 03 June 2020.
NULL
Submitted on: 06 May 2004.
Revised on: 14 May 2004.
Accepted on: 01 June 2004.
Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia
http://reply.papertrans.cn/3/270/26956/26956-35.png
Submitted on: 22 August 2011.
Revised on: 04 October 2011.
Accepted on: 17 October 2011.
Revista Facultad de Ingenieria, Universidad Pedagogica y Tecnologica de Colombia