Cordo, Fernando, Jorge Arzate, and Alejandro Oleaga. “Structure of the Guaraní Aquifer in the Surroundings of the Uruguay River from Magnetotelluric Soundings”. Geofisica Internacional 51, no. 1 (January 1, 2012): 17–37. Accessed May 19, 2024. http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/385.