Nikos Zotos Paraskevi Tzekou George Tsatsaronis Lefteris Kozanidis Sofia Stamou Iraklis Varlamis To Click or not to Click? The Role of Contextualized and User-Centric Web Snippets http://arxiv.org/abs/0903.2544 2009 CoRR abs/0903.2544 db/journals/corr/corr0903.html#abs-0903-2544 informal publication