Information Processing Letters
Information Processing Letters > 2001 > 80 > 2 > 67-73
Information Processing Letters > 2001 > 80 > 5 > 239-242
Information Processing Letters > 2001 > 80 > 6 > 295-298
Information Processing Letters > 2001 > 80 > 2 > 67-73
Information Processing Letters > 2001 > 80 > 5 > 239-242
Information Processing Letters > 2001 > 80 > 6 > 295-298