Kim, T. U., Sung, J. S. and Jo, Y. H. (2000a). “Risk assessment program of underground
pipeline development.” Journal of the Korean Institute For Gas., KIGAS, Vol. 4, No.
2, pp. 37-45 (in Korean).Kim, T. U., Sung, J. S. and Jo, Y. H. (2000a). “Risk assessment
program of underground pipeline development.” Journal of the Korean Institute For
Gas., KIGAS, Vol. 4, No. 2, pp. 37-45 (in Korean).