Submitted on: 04 August 2017.
Revised on: 23 November 2017.
Accepted on: 06 January 2018.
___________________JOURNAL OF SCHEDULING---SPRINGER
Submitted on: 18 November 2014.
Revised on: 26 January 2015.
Accepted on: 02 March 2015.
___________________JOURNAL OF SCHEDULING---SPRINGER
Submitted on: 04 July 2017.
Revised on: 15 September 2017.
Accepted on: 11 November 2017.
___________________JOURNAL OF SCHEDULING---SPRINGER
Submitted on: 14 June 2004.
Revised on: 23 August 2004.
Accepted on: 10 October 2004.
___________________JOURNAL OF SCHEDULING---SPRINGER
Submitted on: 23 May 1999.
Revised on: 10 July 1999.
Accepted on: 15 August 1999.
___________________JOURNAL OF SCHEDULING---SPRINGER
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