Álvarez-Gálvez, J., Plaza, J. F., Muñiz, J. A. and Lozano Delmar, J. (2014): “Application of text mining techniques for frame analysis: identifying the textual framing of immigration in the press”, Estudios sobre el Mensaje Periodístico, 20(2), pp. 919–932. doi: https://doi.org/10.5209/rev_ESMP.2014.v20.n2.47040.