Kritsada Sriphaew Hiroya Takamura Manabu Okumura Cool Blog Classification from Positive and Unlabeled Examples. 62-73 2009 PAKDD http://dx.doi.org/10.1007/978-3-642-01307-2_9 conf/pakdd/2009 db/conf/pakdd/pakdd2009.html#SriphaewTO09