Petr Hruby, Tomas Nahlik and Dana Smetanova 2020. Effects of Boundary Conditions on the Modal and Spectral Properties of the Shaft. Communications - Scientific letters of the University of Zilina. 22, 1 (Jan. 2020), 42-47. DOI:https://doi.org/10.26552/com.C.2020.1.42-47.