Aguirre, J., N. Medrano, B. Calvo, and S. Celma. “Low-Power 3V Single Supply Lock-in Amplifier”. Jornada de Jóvenes Investigadores del I3A (May 1, 2012): 2. Accessed September 9, 2025. https://despapiro.unizar.es/ojs/index.php/jji3a/article/view/1781.