ABADAL, Ernest; CODINA, Lluí­s. The scientific information ecosystem: structure and aggregation levels. Anuario ThinkEPI, [S. l.], v. 5, p. 128–131, 2011. Disponível em: https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/30482. Acesso em: 7 may. 2026.