Information Processing Letters
Information Processing Letters > 2004 > 89 > 1 > 37-42
Information Processing Letters > 2004 > 89 > 6 > 297-301
Information Processing Letters > 2004 > 90 > 3 > 115-120
Information Processing Letters > 2004 > 90 > 5 > 233-238
Information Processing Letters > 2004 > 92 > 2 > 89-94
Information Processing Letters > 2004 > 92 > 5 > 219-223