Córdova-Fraga, T., D. Rodríguez, J. M. De la Roca-Chiapas, M. Sosa, M. A. Hernández, M. Vargas, S. E. Solorio, and J. J. Bernal. “Magnetic Characterization of Solid Food to Gastric Emptying Studies by Mechanical-Magnetogastrography Assessment”. Revista Mexicana De Ingenieria Biomedica, vol. 32, no. 1, July 2011, pp. 20-24, http://www.rmib.mx/index.php/rmib/article/view/236.