INFORMATION SCIENCES, vol. 194, page. 38 - 56, 2012-07-01
INFORMATION SCIENCES, vol. 188, page. 151 - 169, 2012-04-01
INFORMATION SCIENCES, vol. 194, page. 24 - 37, 2012-07-01
INFORMATION SCIENCES, vol. 211, page. 18 - 35, 2012-11-30
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