« The approximate or exact analytical solutions for the differential equations which describe parametric free vibrations of mechanical systems », ANN_UDJG_IM, vol. 20, nᵒ 1, p. 65–68, juin 2013, Consulté le: nov. 02, 2026. Disponible sur: https://ojs.ugal.ro/index.php/im/article/view/3556