Source: https://www.researchgate.net/profile/Serge-Samper/publication/236029617_Conception_d'une_cloche_Mise_en_place_d'une_demarche_de_simulation_vibratoire/links/5a80d028a6fdcc0d4bac4527/Conception-dune-cloche-Mise-en-place-dune-demarche-de-simulation-vibratoire.pdf