Gómez-Rodríguez, A., and J.-L. Aragón. “Teaching the Mathematics of Quantum Entanglement Using Elementary Mathematical Tools”. Revista Mexicana De Física E, vol. 58, no. 1 Jan-Jun, Jan. 2012, pp. 61-66, https://rmf.smf.mx/ojs/index.php/rmf-e/article/view/4680.