1. Introduction to Earthquake Engineering;Okamoto,1984
2. Report No. FHWA-IP-87-6, Federal Highway Administration, May 1987 California Department of Transportation;Seismic Design and Retrofit Manual for Highway Bridges,1983
3. Research in vibration analysis of highway bridges;Gangaro;Shock and Vibration Digest,1984
4. American Association of State Highway and Transportation Officials (AASHTO);Guide Specification for Seismic Design of Highway Bridges,1983