Rodríguez-Sierra, J., and A. Soria. “TWO MODELS OF ELECTRICAL IMPEDANCE FOR ELECTRODES WITH TAP WATER AND THEIR CAPABILITY TO RECORD GAS VOLUME FRACTION”. Revista Mexicana De Ingeniería Química, Vol. 15, no. 2, Jan. 2020, pp. 543-51, http://www.rmiq.org/ojs311/index.php/rmiq/article/view/1187.