Volkens, , Andrea, Cristina Ares, Radostina Bratanova, & Lea Kaftan,. 2015. Scope, Range, and Extent of Manifesto Project Data Usage: a New Research Tool for Manifesto Project Database’s Users. RIPS: Revista de Investigaciones Políticas y Sociológicas 14. https://revistas.usc.gal/index.php/rips/article/view/2896 (30 abril, 2024).