[Air-L] Papers on Public Opinion

Hello everyone! I'm a master student from Brazil and I'm assembling my PhD project. Since you guys have already given great ideas and suggestions through this list, I'm asking for your help. I'd like some advice on relevant papers to look at, regarding the influence of the web (specially social network sites) on the formation of public opinion. Thanks, in advance :) Patrícia Rossini Jornalista e mestranda do PPGCOM/UFJF (32) 8806-7216 . 8864-9327