Submitted on: 28 September 2001.
Revised on: 16 January 2002.
Accepted on: 05 February 2002.
___________________Ingenieria e Investigacion---UNIV NAC COLOMBIA, FAC INGENIERIA
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Submitted on: 06 June 2021.
Revised on: 02 July 2021.
Accepted on: 15 August 2021.
___________________Ingenieria e Investigacion---UNIV NAC COLOMBIA, FAC INGENIERIA
Submitted on: 12 June 2017.
Revised on: 08 July 2017.
Accepted on: 04 August 2017.
___________________Ingenieria e Investigacion---UNIV NAC COLOMBIA, FAC INGENIERIA
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Submitted on: 09 November 2001.
Revised on: 10 January 2002.
Accepted on: 31 January 2002.
___________________Ingenieria e Investigacion---UNIV NAC COLOMBIA, FAC INGENIERIA