Source: https://www.researchgate.net/profile/Mounir_Naouar/publication/282804540_Etude_comparative_theorique_et_experimentale_entre_la_TFCT_et_la_TPWV_dans_l'analyse_de_la_variabilite_sinusale/links/561cc16f08ae78721fa24f65/Etude-comparative-theorique-et-experimentale-entre-la-TFCT-et-la-TPWV-dans-lanalyse-de-la-variabilite-sinusale.pdf