1. Kim , D. W.2006. Experimental study on the applicability of pile used as earth retaining structure. M. S. Thesis, Pusan National University, Busan, Korea: 46–71.
2. Park , L. K. 2003 . A study on the characteristic of ground behaviour and settlement restraining effect of micropile during shallow tunnel construction in soft ground. Ph. D. Dissertation, Pusan National University, Busan, Korea: 134–146.