1. Clough, R.W., Penzien, J., Dynamics of Structures, McGraw-Hill, New York 1975.
2. Priestley, M.B., Evolutionary Spectra and Nonstationary Processes, J. Roy. Statistical Society, 1965, 27, 204–228.
3. Vanmarcke, E.H., Structural Response to Earthquakes in: Seismic Risk and Engineering Decision (Eds. C. Lomnitz and E. Rosenblueth ), Elsevier Publishing Co., Amsterdam, London, New York 1976.
4. Shinozuka, M., Sato, Y., Simulation of Nonstationary Random Processes, J. Eng. Mech. Div. Proc. ASCE 1967, 93, 11–40.
5. Kanai, K., An Empirical Formula for the Spectrum of Strong Earthquake Motions, Bull. Earthquake Res. Inst., Univ. of Tokyo 1961, 39, 85–95.