"Methodology for the study of unexploited aquifers with thermal waters: Application to the aquifer of the Alhama de Aragon hot springs" by E. Sanz and J.G. Yelamos, November-December 1998 issue, v. 36, no. 6: 913-923. - Navarro, JAS; Coloma, P; Maestro, A (Groundwater, 2000)