Link

Schwartz, C.W., Azzouz, A.S., and Einstein, H.H. (1983). Closure to “Example Cost Of 3‐D FEM for Underground Openings” by Charles W. Schwartz, Amr S. Azzouz, and Herbert H. Einstein (September, 1982), Geotechnical Engineering, 109 (11), 1499-1500. doi:10.1061/(ASCE)0733-9410(1983)109:11(1499)