Information Processing Letters
Information Processing Letters > 1999 > 69 > 2 > 59-62
Information Processing Letters > 2008 > 108 > 1 > 10-14
Information Processing Letters > 2009 > 109 > 12 > 611-614
Information Processing Letters > 1999 > 69 > 2 > 59-62
Information Processing Letters > 2008 > 108 > 1 > 10-14
Information Processing Letters > 2009 > 109 > 12 > 611-614