Hewlett, Bill; Jones, Andrew; Marchand, Stuart; Bell, Brian (1 May 2014). "Re-visiting Bragg to keep UK's temporary works safe under EuroNorms". Proceedings of the Institution of Civil Engineers - Forensic Engineering. 167 (2): 58. doi:10.1680/feng.13.00020.
Hewlett, Bill; Jones, Andrew; Marchand, Stuart; Bell, Brian (1 May 2014). "Re-visiting Bragg to keep UK's temporary works safe under EuroNorms". Proceedings of the Institution of Civil Engineers - Forensic Engineering. 167 (2): 60. doi:10.1680/feng.13.00020.