Submitted on: 31 March 2002.
Revised on: 09 May 2002.
Accepted on: 24 May 2002.
NULL
Submitted on: 28 February 2005.
Revised on: 29 March 2005.
Accepted on: 25 April 2005.
NULL
http://reply.papertrans.cn/3/270/26919/26919-23.png
http://reply.papertrans.cn/3/270/26919/26919-24.png
Submitted on: 09 March 2016.
Revised on: 20 March 2016.
Accepted on: 11 April 2016.
Revista Electronica Interuniversitaria de Formacion del Profesorado
http://reply.papertrans.cn/3/270/26919/26919-26.png
Submitted on: 25 September 2018.
Revised on: 24 October 2018.
Accepted on: 14 November 2018.
NULL
http://reply.papertrans.cn/3/270/26919/26919-28.png
http://reply.papertrans.cn/3/270/26919/26919-29.png
Submitted on: 02 July 2023.
Revised on: 07 August 2023.
Accepted on: 28 August 2023.
NULL