Roca Cladera, J., and C. Marmolejo Duarte. “The City Dynamics of Scientific Publication and Printing: An Analysis of the Principle Cities World-Wide Involved in This”. Ciudad Y Territorio Estudios Territoriales, vol. 39, no. 151, Mar. 2007, pp. 11-25, https://recyt.fecyt.es/index.php/CyTET/article/view/75729.