Information Processing Letters
Information Processing Letters > 2007 > 101 > 5 > 181-184
Information Processing Letters > 2009 > 109 > 23-24 > 1232-1234
Information Processing Letters > 2014 > 114 > 6 > 294-298
Information Processing Letters > 2007 > 101 > 5 > 181-184
Information Processing Letters > 2009 > 109 > 23-24 > 1232-1234
Information Processing Letters > 2014 > 114 > 6 > 294-298