Leandro Rodríguez LiñaresPedro CuestaRaúl AlonsoArturo J. MéndezMaría J. LadoXosé A. VilaVARVI: A Software Tool for Analyzing the Variability of the Heart Rate in Response to Visual Stimuli.401-4042013CinChttp://www.cinc.org/archives/2013/pdf/0401.pdfhttps://ieeexplore.ieee.org/document/6713398/conf/cinc/2013db/conf/cinc/cinc2013.html#LinaresCAMLV13