Source: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/1A5D09C325CD11C84AD0ECF10EF541B2/S003515631100018Xa.pdf/un_rapport_indispensable_de_lacademie_des_sciences_et_de_lacademie_des_technologies_sur_la_metallurgie_science_et_ingenierie.pdf