WALPOLE, W. R.; BUTCHER, G. W. Beam design
. Bulletin of the New Zealand Society for Earthquake Engineering, [S. l.], v. 18, n. 4, p. 337–343, 1985. DOI: 10.5459/bnzsee.18.4.337-343. Disponível em: https://bulletin.nzsee.org.nz/article/view/855. Acesso em: 7 may. 2026.