Source: https://www.researchgate.net/profile/Bertrand-Mafart/publication/30452863_Application_pratique_de_la_methode_d'estimation_de_l'age_au_deces_de_Schmitt_et_Broqua_2000/links/53d800470cf2a19eee7feb06/Application-pratique-de-la-methode-destimation-de-lage-au-deces-de-Schmitt-et-Broqua-2000.pdf