Source: https://www.researchgate.net/profile/Philippe_Darnis/publication/45866725_Determination_Du_Centre_De_Raideur_Pour_Les_Machines-Outils_-_Application_Au_Tournage/links/0deec51c1b18d7a2c2000000/Determination-Du-Centre-De-Raideur-Pour-Les-Machines-Outils-Application-Au-Tournage.pdf