1. 4) BERG G. V. Energy Consumption by Structures in Strong-Motion Earthquakes. Proc. 2WCEE. (1960) p.681-697.
2. 5) PENZIEN J. Elasto-Plastic Response of Idealized Multi-Story Structures Subjected to a Strong Motion Earthquake. Proc. 2WCEE. (1960) p.739-760.
3. 6) VELETSOS A. S. Effect of Inelastic Behavior on the Response of Simple systems to Earthquake Motions. Proc. 2WCEE. (1960) p.895-912.
4. 9) MURPHY M. J. The Response of a Nonlinear Oscillator to an Earthquake. Bull. Seis. Soc. Amer.. (1956) p.57-65.
5. 10) HOUSNER G. W. Limit Design of Structures to Resist Earthquakes. Proc. WCEE. (1956) p.5.1-5.13.