L. GEESLIN, Kimberly; GUIJARRO FUENTES, Pedro. Age-related factors in copula choice in steady state L2 Spanish grammars. Revista Electrónica de Lingüística Aplicada, [S. l.], v. 2, n. 1, p. 83–110, 2003. Disponível em: https://matrix.aesla.org.es/RAEL/article/view/89. Acesso em: 21 may. 2025.