Submitted on: 24 June 2009.
Revised on: 29 September 2009.
Accepted on: 27 November 2009.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
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Submitted on: 21 November 1998.
Revised on: 03 January 1999.
Accepted on: 26 February 1999.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
Submitted on: 25 December 2000.
Revised on: 19 March 2001.
Accepted on: 18 April 2001.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
Submitted on: 27 January 2010.
Revised on: 26 April 2010.
Accepted on: 02 June 2010.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
Submitted on: 17 February 2012.
Revised on: 07 May 2012.
Accepted on: 17 May 2012.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
Submitted on: 23 December 2023.
Revised on: 29 February 2024.
Accepted on: 17 March 2024.
___________________JOURNAL OF THE ACM---ASSOC COMPUTING MACHINERY
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