Tíjaro Rojas, O. J., Y. D. J. Ruidíaz Pawmino, J. E. Higuera Portilla, and J. G. Barreto Pérez. “Design and Construction of a Portable Spectrum Analyzer Using a Graphic LCD and a Freescale dsp56f807”. Revista UIS Ingenierías, vol. 5, no. 1, May 2006, pp. 1-10, https://revistas.uis.edu.co/index.php/revistauisingenierias/article/view/1733.