Rivas, Javier, y Esther L. Brown. «Stage-Level and Individual-Level distinction in morphological variation». Borealis – An International Journal of Hispanic Linguistics 1, no. 2 (noviembre 27, 2012): 73–90. Accedido julio 24, 2026. https://septentrio.uit.no/index.php/borealis/article/view/2340.