1. MSc Thesis;S M An,2004
2. Barton, N., Lien, R., and Lunde, J. (1974). “Engineering classification of jointed rock masses for the design of tunnel support.” Rock Mechanics, Vol. 6, No. 4, pp. 189–236, DOI: https://doi.org/10.1007/BF01239496.
3. Bieniawski, Z. T. (1989). Engineering rock mass classification, Wiley, Chichester, UK, pp. 251.
4. Chae, Y. S. and Moon, I. (1994). “Earth pressure on retaining wall by considering local soil condition.” Proc., on Fall Conference, Korean Geotechnical Society, Seoul, Korea, pp. 129–138.
5. MSc Thesis;K S Choi,1996