prepared by Technology Development of California, inc. ; principal investigator, H.J. Kopp ; Intermountain Technologies, inc. ; principal investigator, G.A. Cordes
prepared by Intermountain Technologies, inc. ; authors, G.A. Mortensen ... [and others] ; Science Applications, inc. ; author, M. Gross ; Northwestern University, The Technological Institute, Department of Civil Engineering ; author, T. Belytschko