Information Processing Letters
Information Processing Letters > 1997 > 62 > 2 > 89-94
Information Processing Letters > 1997 > 62 > 2 > 81-88
Information Processing Letters > 1997 > 62 > 5 > 245-250
Information Processing Letters > 1997 > 62 > 2 > 89-94
Information Processing Letters > 1997 > 62 > 2 > 81-88
Information Processing Letters > 1997 > 62 > 5 > 245-250