Berumen, Sergio A., y Francisco LLAMAZARES REDONDO. «Cooperate to compete: cooperation among firms as a strategy to encourage the competitiveness». Papeles de Europa 22 (mayo 20, 2011): 76–96. Accedido julio 10, 2026. https://revistas.ucm.es/index.php/PADE/article/view/PADE1111120076A.