KELLER, Damián. Characterizing resources in ubimus1 research: Volatility and rivalry. Cadernos de Informática, [S. l.], v. 8, n. 4, p. 57–68, 2015. Disponível em: https://seer.ufrgs.br/index.php/cadernosdeinformatica/article/view/v8n4pp57-68. Acesso em: 17 set. 2026.