Bandis, S. C., Lumsden, A. C., and Barton, N. R., 1983, Fundamentals of rock joint deformation, In International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 20(66), 249-268.
Bieniawski, Z. T., 1989, Engineering rock mass classifications, Wiley, NewYork.
Dourado, J. C., Filho, W. M., Braga, A. C. O., and Nava, N., 2001, Detection of cavities in sandstone using gravity, resistivity and GPR methods, Brazilian Journal of Geophysics, 19, 19-32.
Itasca Consulting Group, Inc, 2004, Universal Distinct Element Code 2D, Itasca Consulting Group, Minnesota, USA.
Keller, E. A., 1996, Environmental Geology. Prentice Hall, NJ, USA, 562.
Kim, C. R., Kim, J. H., Park, S. G., Park, Y. S., Yi, M. J., Son, J. S., and Rim, H. R., 2006, Application of Geophysical Methods to Cavity Detection at the Ground Subsidence Area in Karst, Korean Society of Earth and Exploration Geophysicists, 4, 271-278.
Kim, K. W., 1993, Revaluation of geomechanics classifications of rock masses, Journal of the Korean Geotechnical Society, 33-40.
Kim, J. H., 2001, Dipro for windows V. 4.0.
Kim, J. H., Cho, S. J., and Yi, M. J., 2004, Borehole radar survey to explore limestion cavities for the construction of a highway bridge, Exploration Geophysics, 35, 80-87.
Loke, M. H., and Barker, R. D., 1996, Practical techniques for 3D resistivity surveys and data inversion, Geophysical Prospecting, 44(3), 499-523.
Mark, H. D., and Eric, R., 1999, Two-dimensional resistivity profiling; geophysical weapon of choice in karst terrain for engineering applications, Hydrogeology and engineering geology of sinkholes and karst, Balkema, Rotterdam, 219-224.
Murck, B. W., Skinner, B. J., and Porter, S. C., 1995, Environmental Geology. John Wiley & Sons, New York, USA, 154.
Park, C. B., Miller, R. D., and Xia, J., 1999, Detection of near-surface voids using surface wave, In Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 1999), Oakland, CA, 14-18.
Park, S. G., Kim, C. R., Son, J. S., Kim, J. H., Yi, M. J., and Cho, S. J., 2006, Detection of limesilicate cavities by 3-D electrical resistivity survey, Economic and Environmental Geology, 39(5), 597-608.
Roth, M. J. S., Mackey, J. R., Mackey, C., and Nyquist, J. E., 1999, A case study of the reliability of multi-electrode earth resistivity testing for geotechnical investigations in karst terrains, Hydrogeology and engineering geology sinkholes and karst, Balkema, Rotterdam, 247-252.
Shin, J. H., Park, C., Song, W. K., Han, K. C., and Kim, J. H., 2004, Stability evaluation of subsidence of limestone zone exiting shallow subsurface, Korean Society for Rock Mechanics, 159-170.
Song, S. H., Jang, E. W., Kim, J. H., Kim, J. S., and Kim, J. C., 2002, Electrical resistivity survey for evaluation of reinforced region by cement grouting in dike, Engineering Geology, 12(1), 63-74.
Waltham, T., Bell, F. G., and Culshaw, M., 2005, Sinkholes and subsidence: Karst and cavernous Rocks in engineering and construction, Environmental and Engineering Geoscience, 11(2), 180.
Yuhr, L., Bension, R. C., and Butler, D., 1993, Characterization of karst features using electromagnetics and microgravity: a strategic approach, Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems, San Diego, California, USA, 209-228.