1. I. Farhoomand and E. Wilson A nonlinear finite element code for analysing the blast response of underground structures , Contract Rep. N-70-1 , U. S. Army Engineering Waterways Experiment Station , Vicksburg , Miss .
2. M. Shinozuka and C.M. Jan Simulation of multivariate and multidimensional random processes , II, NSF GK-3858 and 24925, Tech. Rep. No. 12 , Dep. Civil Eng. Eng. Mech. Columbia Univ. , New York , N. Y. , April 1971 .