Einstein, H.H., Salazar, G.F., , A.F., Kim, Y.W., and Ioannou, P.G. (1987). Computer-based decision support systems for underground construction. In: Proceedings of the Rapid Excavation and Tunneling Conference, New Orleans, Louisiana, 14-18 June 1987. New York: Society of Mining Engineers of the American Institute of Mining, Metallurgical, and Petroleum Engineers, 1987. library