1. Hiriart F. R. J. Marsal and E. Rosenblueth "Los Effectos del Terremoto del 28 de Julio y la Consiguiente Revision de los Criterios para el Diseno Sismico de Estructuras " Revista Ingenieria Universidad Nacional de Mexico January 1958.
2. Housner G. W. "Characteristics of Strong-Motion Earthquakes " Bulletin of Seismological Society of America Vol. 37 1947.
3. Aseismic Design of Firmly Founded Structures;GoDdman L. E.;Transactions American Society of Civil Engineers,1952
4. Earthquake Resistant Design Based on Dynamic Properties of Earthquakes;Housner G. W.;Journal of American Concrete Institute,1956
5. Housner G. W. R. R. Martel J. L. Alford "Spectrum Analysis of Strong-Motion Earthquakes " Bulletin of Seismological Society of America Vol. 43 1953.