Information Processing Letters
Information Processing Letters > 2005 > 95 > 1 > 329-332
Information Processing Letters > 2005 > 95 > 1 > 299-306
Information Processing Letters > 2005 > 95 > 1 > 321-327
Information Processing Letters > 2005 > 95 > 1 > 313-320
Information Processing Letters > 2005 > 95 > 1 > 293-298