1. The drift spectrum: a measure of demand for earthquake ground motions;Iwan;J. Struct. Eng., ASCE,1997
2. Westergaard HM. Earthquake-shock transmission in tall buildings. Engineering New-Record 1993 Nov 30.
3. Dynamics of structures;Clough,1993
4. Akkar S, Gülkan P. Examination of selected recent ground motion records from Turkey in terms of displacement design procedures. In: Proceedings of the Sixth International Conference on Seismic Zonation, Palm Springs, CA, 2000 [CD-ROM]. Earthquake Engineering Research Institute, Paper No. 60.