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of Civil Engineers, Vol. 28, No. 6, pp. 859-869 (in Korean).Lee, S., Kim, J., Kang,
S. and Seo, J. (2008). “Development of task planning system for intelligent excavating
system applying heuristics.” Journal of the Korean Society of Civil Engineers, Vol.
28, No. 6, pp. 859-869 (in Korean).