Submitted on: 12 January 2014.
Revised on: 24 April 2014.
Accepted on: 11 May 2014.
___________________Entertainment Computing---ELSEVIER SCI LTD
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Submitted on: 15 January 2014.
Revised on: 14 April 2014.
Accepted on: 29 April 2014.
___________________Entertainment Computing---ELSEVIER SCI LTD
Submitted on: 03 August 2018.
Revised on: 10 October 2018.
Accepted on: 16 November 2018.
___________________Entertainment Computing---ELSEVIER SCI LTD
Submitted on: 10 February 2014.
Revised on: 08 March 2014.
Accepted on: 27 April 2014.
___________________Entertainment Computing---ELSEVIER SCI LTD
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Submitted on: 16 October 2015.
Revised on: 26 January 2016.
Accepted on: 24 March 2016.
___________________Entertainment Computing---ELSEVIER SCI LTD