Lu, Yiqiu, and Richard S. Henry. “Minimum Vertical Reinforcement in RC Walls: Theoretical Requirements for Low and High Ductility Demands”. Bulletin of the New Zealand Society for Earthquake Engineering, vol. 50, no. 4, Dec. 2017, pp. 471-8, https://doi.org/10.5459/bnzsee.50.4.471-481.