Martínez Martínez, A., C. J. López Arriola, and J. R. Jiménez Alaniz. “Microcontroller for a Volumetric Respirator”. Revista Mexicana de Ingenieria Biomedica 9, no. 1 (October 15, 1988): 8. Accessed January 11, 2025. http://mail.rmib.mx/index.php/rmib/article/view/653.