Williams , R. L. “Design of Shear Walls for Seismic Resistance" - I. C. Armstrong : Bulletin of N.Z. National Society for Earthquake Engineering, Vol. 10, No. 1, March, 1977. BNZSEE 1977, 10 (3), 159-160. https://doi.org/10.5459/bnzsee.10.3.159-160.