Ciordia, A. y Letamendia, A. 2021. Using Social Network Analysis to study the Modularity of Protest Forms: The evolution of the Basque Repertoire of Contention (1980- 2014). Empiria. Revista de metodología de ciencias sociales. 52 (sep. 2021), 53–95. DOI:https://doi.org/10.5944/empiria.52.2021.31365.