Díaz, A. (2011) “Quality Web Information Retrieval: Towards Improving Semantic Recommender Systems with Friendsourcing”, Cadernos de Informática, 6(1), p. 289–292. Disponível em: https://seer.ufrgs.br/index.php/cadernosdeinformatica/article/view/v6n1p289-292 (Acesso em: 28 agosto 2026).