Hernández Gaona, L. C., and M. Linding Boss. “Synchronuos Circuit for Display of Biological Siganls in a Cathode Ray Tube”. Revista Mexicana De Ingenieria Biomedica, vol. 5, no. 1, Mar. 2018, p. 6, http://rmib.com.mx/index.php/rmib/article/view/487.