K. Watanabe, H. Sei, T. Nishiyama, and Y. Ishii. 2011. “Static Axial Reciprocal Load Test of Cast-in-place Nodular Concrete Pile and Nodular Diaphrgm Wall”. Geotechnical Engineering Journal of the SEAGS & AGSSEA 42 (2). Bangkok, Thailand:11-19. https://doi.org/10.14456/seagj.2011.18.