Development of First Proto-Types of a Low-Cost Computer based Solid-State Spirometer for Application in Rural Health-Care Centres Across India. Global Journal of Medical Research, [S. l.], v. 13, n. D2, p. 7–18, 2013. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/370. Acesso em: 4 apr. 2026.