Submitted on: 23 June 2002.
Revised on: 08 August 2002.
Accepted on: 02 September 2002.
___________________International Journal of Mathematical Education in Science and Technology
Submitted on: 12 January 2007.
Revised on: 22 February 2007.
Accepted on: 01 April 2007.
___________________International Journal of Mathematical Education in Science and Technology
Submitted on: 02 October 2011.
Revised on: 23 January 2012.
Accepted on: 06 March 2012.
___________________International Journal of Mathematical Education in Science and Technology
http://reply.papertrans.cn/2/138/13718/13718-14.png
Submitted on: 23 July 2012.
Revised on: 22 September 2012.
Accepted on: 20 October 2012.
___________________International Journal of Mathematical Education in Science and Technology
Submitted on: 10 October 2006.
Revised on: 21 January 2007.
Accepted on: 26 February 2007.
___________________International Journal of Mathematical Education in Science and Technology
Submitted on: 31 October 2017.
Revised on: 21 December 2017.
Accepted on: 03 January 2018.
___________________International Journal of Mathematical Education in Science and Technology
http://reply.papertrans.cn/2/138/13718/13718-18.png
Submitted on: 13 November 2019.
Revised on: 29 January 2020.
Accepted on: 07 March 2020.
___________________International Journal of Mathematical Education in Science and Technology
Submitted on: 17 December 2002.
Revised on: 26 March 2003.
Accepted on: 03 May 2003.
___________________International Journal of Mathematical Education in Science and Technology