Reyes, S., A. Fraguela, V. A. Cruz, and E. A. Romano. “Analytical Solution of the Direct Problem of Electrical Capacitance Tomography for Two-Phase fluid With a Circular Inclusion”. Revista Integración, Temas De matemáticas, vol. 30, no. 2, Nov. 2012, pp. 227-38, https://revistas.uis.edu.co/index.php/revistaintegracion/article/view/2904.