Hernández Cáceres, Jose Luis, et al. «The Relationship of Age With Spectral Components of Noise-Free Realizations of Photoplethysmographic Signals: Outcomes of a Nonlinear Identification Approach». Revista Cubana De Informática Médica, vol. 11, n.º 2, diciembre de 2019, https://revinformatica.sld.cu/index.php/rcim/article/view/335.