1. S. Ziemba, Vibration Analysis, Vol. II, PWN, Warsaw, 1959 (in Polish).
2. R. Solecki, M. Szymkiewicz, Rod-like and Surface-like Systems. Dynamical Calculations, Arkady, Warsaw, 1964 (in Polish).
3. S. Kaliski, Vibrations and Waves in Solids, IPPT PAN, Warsaw, 1966 (in Polish).
4. Vibrations and Shock in Damped Mechanical Systems;Snowdon,1968
5. Vibration of Solids and Structures under Moving Loads;Fryba,1972