Information Processing Letters
Information Processing Letters > 2003 > 85 > 1 > 47-52
Information Processing Letters > 2003 > 86 > 3 > 143-148
Information Processing Letters > 2003 > 87 > 6 > 321-326
Information Processing Letters > 2003 > 85 > 1 > 47-52
Information Processing Letters > 2003 > 86 > 3 > 143-148
Information Processing Letters > 2003 > 87 > 6 > 321-326