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Submitted on: 03 February 2018.
Revised on: 28 February 2018.
Accepted on: 27 March 2018.
Punto Genero---UNIV CHILE, FAC CIENCIAS SOCIALES
Submitted on: 23 January 1998.
Revised on: 18 February 1998.
Accepted on: 28 February 1998.
Punto Genero
Submitted on: 29 August 2006.
Revised on: 28 September 2006.
Accepted on: 13 October 2006.
Punto Genero
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Submitted on: 11 January 2006.
Revised on: 22 February 2006.
Accepted on: 07 March 2006.
Punto Genero
http://reply.papertrans.cn/3/259/25840/25840-17.png
Submitted on: 30 January 2010.
Revised on: 07 February 2010.
Accepted on: 24 February 2010.
Punto Genero---UNIV CHILE, FAC CIENCIAS SOCIALES
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http://reply.papertrans.cn/3/259/25840/25840-20.png