Rodrí­guez-Yunta, Luis. “Buying Articles on the Internet and Open Access Policies: Could Journal Subscriptions Be Replaced by Pay-Per-View Access?”. Anuario ThinkEPI 6 (October 3, 2012): 197–199. Accessed May 7, 2026. https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/30419.