Integrated design for a compact low consumption Lock-In amplifier for portable applications. Superficies y Vacío, [S. l.], v. 27, n. 2, p. 66–73, 2014. Disponível em: https://www.superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/138. Acesso em: 5 feb. 2026.