A. Alex Amor, A. Tamayo Domínguez, A. Palomares Caballero, J.M. Fernández González, P. Padilla, J. Valenzuela Valdés and J.M. A. Palomares, IEEE Access, vol. 7, issue: 1, pp. 14883-14893 January 2019 (DOI:
10.1109/ACCESS.2019.2894167) (ISSN: 2169-3536)