VAN ARK, B. Productivity in Spanish manufacturing: half a century of growth and convergence. Revista de Historia Industrial — Industrial History Review, [S. l.], n. 19-20, p. 77–101, 2017. Disponível em: https://revistes.ub.edu/index.php/HistoriaIndustrial/article/view/19394. Acesso em: 17 jan. 2025.