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The Journal of Systems & Software > 2011 > 84 > 12 > 2186-2195
Information Processing Letters > 2010 > 110 > 3 > 83-87
Journal of Computer and System Sciences > 2009 > 75 > 3 > 178-189
The Journal of Systems & Software > 2011 > 84 > 12 > 2186-2195
Information Processing Letters > 2010 > 110 > 3 > 83-87
Journal of Computer and System Sciences > 2009 > 75 > 3 > 178-189