Information Processing Letters
Information Processing Letters > 2012 > 112 > 7 > 298-301
Information Processing Letters > 2012 > 112 > 8-9 > 335-340
Information Processing Letters > 2012 > 112 > 16 > 656-661
Information Processing Letters > 2012 > 112 > 7 > 298-301
Information Processing Letters > 2012 > 112 > 8-9 > 335-340
Information Processing Letters > 2012 > 112 > 16 > 656-661