Soto, J., T. Córdova, M. Sosa, and S. Jerez. “Quantum-Mechanical Aspects of Magnetic Resonance Imaging”. Revista Mexicana De Física E, vol. 63, no. 1 Jan-Jun, Jan. 2017, pp. 48-55, https://rmf.smf.mx/ojs/index.php/rmf-e/article/view/4767.