POTÎRNICHE, A. M., O. VASILE, and G. F. CĂPĂȚÂNĂ. “Modal Analysis of a Mechanical System Modeled As a 6 Degrees-of-Freedom Solid Body With Elastic Bearings and Structural Symmetries”. Romanian Journal of Acoustics and Vibration, Vol. 19, no. 1, Mar. 2022, pp. 36-40, http://rjav.sra.ro/index.php/rjav/article/view/297.