Source: https://www.researchgate.net/profile/Nicole_Vincent/publication/281075686_Nouvelle_approche_d'extraction_de_l'axe_median_dans_les_traits_manuscrits_application_a_la_constitution_du_code_book/links/560a4acd08ae576ce63fbd39/Nouvelle-approche-dextraction-de-laxe-median-dans-les-traits-manuscrits-application-a-la-constitution-du-code-book.pdf