Liu, Aizhen, and R. Park. “Seismic Load Tests on Two Concrete Interior Beam-Column Joints Reinforced
by Plain Round Bars Designed to Pre-1970s Codes ”. Bulletin of the New Zealand Society for Earthquake Engineering, vol. 31, no. 3, Sept. 1998, pp. 164-76, https://doi.org/10.5459/bnzsee.31.3.164-176.