Gracia, Maximiliano. “Economic Polarization of the Hidalgo Territory. An Approach from the Concept of Space”. Journal of Administrative Science UAEH 2, no. 3 (July 5, 2020): 1–11. Accessed November 3, 2025. https://repository.uaeh.edu.mx/revistas/index.php/jas/article/view/5747.