Einstein, H. H., Hirschfeld, R.C., Nelson, R.A., and Bruhn, R.W. (1969). Model studies of jointed-rock behavior. In: Proceedings of the 11th U.S. Symposium on Rock Mechanics (USRMS), 16-19 June, Berkeley, California. ARMA-69-0083
Einstein, H. H., Hirschfeld, R.C., Nelson, R.A., and Bruhn, R.W. (1969). Model studies of jointed-rock behavior. In: Proceedings of the 11th U.S. Symposium on Rock Mechanics (USRMS), 16-19 June, Berkeley, California. ARMA-69-0083