Calvo Ángel. Autochthonous technology and oligopoly in the telecommunications sector: Amper, 1980-2003. RHI-IHR [Internet]. 2020Jul.15 [cited 2024Jul.19];29(79):165-202. Available from: https://revistes.ub.edu/index.php/HistoriaIndustrial/article/view/31060