“Cylindrical Precessions of an Unbalanced Jeffcott Rotor with four Degrees of Freedom in Non-linear Elastic Supports”, TechMech, vol. 26, no. 2, pp. 117–130, Aug. 2019, Accessed: Oct. 26, 2026. Available: https://journals.ub.ovgu.de/ojs/techmech/article/view/881