Carrasco-Campos, Ángel, and E. Saperas. “The Operationalization of the Concept of Framing in the "Journal of Communication" (2009-2013): Objects of Study, Research Techniques and Theoretical Construction”. Communication & Society, Vol. 28, no. 4, Oct. 2015, pp. 49-64, doi:10.15581/003.28.35941.