J. Soto-Vázquez, F. J. Jaraíz-Cabanillas, J. A. Gutiérrez-Gallego, R. Pérez-Parejo, and R. Tena Fernández, “Evolution of publishing production in the Autonomous Community of Extremadura, Spain (2007-2015)”, Rev. gen. inf. doc., vol. 29, no. 2, pp. 377–398, Dec. 2019, doi: 10.5209/rgid.66973.