Information Processing Letters
Information Processing Letters > 1997 > 64 > 6 > 299-303
Information Processing Letters > 1998 > 67 > 4 > 191-197
Information Processing Letters > 2003 > 86 > 4 > 169-176
Information Processing Letters > 2004 > 92 > 2 > 83-87
Information Processing Letters > 2007 > 104 > 5 > 179-182
Information Processing Letters > 2010 > 110 > 11 > 431-438
Information Processing Letters > 2010 > 110 > 14-15 > 614-620