Linhares, Alexandre, and Carla Winter Afonso. “Internet Search Mechanisms and Distortions of the Semantic Space: The Scientific Challenges Facing the ‘googles’”. PRISMA.COM, no. 5, Apr. 2007, pp. 67-91, http://84.247.136.72/ojsletrasX/index.php/prismacom/article/view/2096.