http://reply.papertrans.cn/2/128/12704/12704-11.png
Submitted on: 11 November 2014.
Revised on: 04 December 2014.
Accepted on: 18 January 2015.
___________________INSTRUCTIONAL SCIENCE---SPRINGER
http://reply.papertrans.cn/2/128/12704/12704-13.png
http://reply.papertrans.cn/2/128/12704/12704-14.png
Submitted on: 29 April 2016.
Revised on: 10 July 2016.
Accepted on: 16 August 2016.
___________________INSTRUCTIONAL SCIENCE---SPRINGER
http://reply.papertrans.cn/2/128/12704/12704-16.png
http://reply.papertrans.cn/2/128/12704/12704-17.png
Submitted on: 09 May 1999.
Revised on: 13 August 1999.
Accepted on: 03 October 1999.
___________________INSTRUCTIONAL SCIENCE---SPRINGER
Submitted on: 15 October 2023.
Revised on: 11 December 2023.
Accepted on: 29 January 2024.
___________________INSTRUCTIONAL SCIENCE---SPRINGER
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