1. Abascal R. “Estudio de Problemas Dinámicos en Interacción Suelo‐Estructura Mediante el Método de los Elementos de Contorno ” thesis presented to the Escuela Superior de Ingenieros Industrials at Seville Spain in Feb. 1984 in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2. Alarcón E. Domínguez J. and del Caño F. “Dynamic Stiffnesses of Foundations ” Proceedings 2nd International Seminar on Recent Advances in BEM C. A. Brebbia Ed. Univ. of Southampton N.H. Mar. 1980.
3. Apsel R. J. “Dynamic Green's Functions for Layered Media and Applications to Boundary‐Value Problems ” thesis presented to the Univ. of California at San Diego Calif. in 1979 in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
4. A numerical boundary integral equation method for elastodynamics. I
5. A direct formulation and numerical solution of the general transient elastodynamic problem. I