[Air-L] literature recommendations - Political conversation online

Hi everyone! I'm a Pd.D Student in Brazil and I am currently researching political talk that takes place online, specifically on informal conversation sites (SNS, news sites, etc). As I constantly see nice suggestions on the list, I'd like to ask for recommendations on literature regarding political conversation online, engagement with news sites, online discussions and so on. Thanks, in advance! Patrícia Rossini patyrossini@gmail.com