Alarcón Falcón, Humberto. “Comparative Test Effort Electrocardiography - Balistocardiography”. Anales de la Facultad de Medicina 48, no. 2 (June 14, 1965): 277–296. Accessed July 17, 2024. https://revistasinvestigacion.unmsm.edu.pe/index.php/anales/article/view/5785.