Galvis Ortiz, Carlos Alberto. “Oligopolies Versus Democracy: Is This the End of Communication?”. Anagramas Rumbos y Sentidos de la Comunicación 6, no. 12 (September 5, 2014): 13–27. Accessed May 18, 2024. http://udem.scimago.es/index.php/anagramas/article/view/706.