6OGURA H, YAMAGATA K, KISHIDA H. Study on bearing capacity of nodular cylinder pile by scaled model test.[J]. Journal of Structural and Construction Engineering (Transactions of All), 1987, 374: 87-97.
7OGURA H, YAMAGATA K, OHSUGI F. Study on bearing capacity of nodular cylinder pile by full-scaled test of jacked piles.[J]. Journal of Structural and Construction Engineering (Transactions of AIJ), 1988, 386: 66-77.
8OGURA H, YAMAGATA K. A theoretical analysis on loadsettlement behavior of nodular piles. [J]. Journal of Structural and Construction Engineering (Transactions of AIJ), 1988, 395: 152-164.
9TAKASHI H, MADAN B K. Load tests on bored phc nodular piles in different ground conditions and the bearing capacity based on simple soil parameters.[J]. Journal of Structural and Constructian Engineering (Transactions of AIJ), 1995(1 ): 89-94.