Góngora-T., A., E. Le, and -Koo. “On the Evaluation of the Magnetostatic Field Due to Stationary Currents in Toroidal Solenoids”. Revista Mexicana De Física, vol. 42, no. 1, Jan. 1995, pp. 151-60, https://rmf.smf.mx/ojs/index.php/rmf/article/view/2562.