Hernández, José Esteban. «Focus on speaker subjective involvement in Present Perfect grammaticalization: Evidence from two spanish varieties». Borealis – An International Journal of Hispanic Linguistics 2, no. 2 (noviembre 18, 2013): 261–284. Accedido septiembre 11, 2026. https://septentrio.uit.no/index.php/borealis/article/view/2525.