E. Abadal and L. Codina, “The role of subject portals in the postmodern era of online searches”, ThinKEPI, vol. 2, pp. 089–095, Nov. 2008, Accessed: May 07, 2026. [Online]. Available: https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/32049