Googlearchy: How a Few Heavily-Linked Sites Dominate Politics on the Web. Matthew Hindman, Kostas Tsioutsiouliklis, Judy A. Johnson (2003)

Topical interests and the mitigation of search engine bias. S. Fortunato, A. Flammini, F. Menczer, A. Vespignani (2006)

In Google we trust: Users' decisions on rank, position, and relevance. Pan, B., Hembrooke, H., Joachims, T., Lorigo, L., Gay, G., and Granka, L. (2007). Journal of Computer-Mediated Communication, 12(3), article 3.

Discurso e buscadores na Web: sentidos em movimento (Discourse and Search Engines on the Web: senses in movement), Vivian Lemes Moreira, Lucília Maria Sousa Romão.

Is Google Making Us Stupid? What the Internet is doing to our brains. Nicholas Carr (2008)

The Myth of Digital Democracy. Matthew Hindman (2009)