S.G. Mousavi, V. Gagnol, and P. Ray. “Dynamic Model of High Speed Machining Spindle Associated to a Selfvibratory Drilling Head Influence of Drill Torsional-Axial Coupling”. European Journal of Computational Mechanics, vol. 22, no. 2-4, Aug. 2013, pp. 120-31, https://journals.riverpublishers.com/index.php/EJCM/article/view/1397.