Hengeveld, Kees 2010, The focalizing copula in Colombian Spanish. Unpublished presentation.

Kato, Mary A. 2010, ‘Clivadas sem operador no Português Brasileiro’. Estudos da Lingua(gem) 8: 61-77.

Méndez Vallejo, Dunia Catalina 2009, Focalizing ser (‘to be’) in Colombian Spanish. PhD diss. Indiana University. [descargar]

Simões, Antônio R.M. 1992, Com licença! Colombian Spanish for Spanish speakers. Austin: University of Texas Press.