Shuttleworth, Peter (2001). Fire Protection of Concrete Tunnel Linings(PDF). 3rd International Conference on Tunnel Fires and Escape From Tunnels, October 9–11, 2001. Tunnel Management International. Washington, D.C. pp. 157–165. S2CID56401194. Archived from the original(PDF) on July 5, 2016. Retrieved September 16, 2020 – via Adfil.co.uk.
Wang, Y.; Wu, HC.; Li, V. (November 2000). "Concrete Reinforcement with Recycled Fibers". Journal of Materials in Civil Engineering. 12 (4): 314–319. doi:10.1061/(ASCE)0899-1561(2000)12:4(314).
Ochia, T.; Okubob, S.; Fukuib, K. (July 2007). "Development of recycled PET fiber and its application as concrete-reinforcing fiber". Cement and Concrete Composites. 29 (6): 448–455. doi:10.1016/j.cemconcomp.2007.02.002.
Shuttleworth, Peter (2001). Fire Protection of Concrete Tunnel Linings(PDF). 3rd International Conference on Tunnel Fires and Escape From Tunnels, October 9–11, 2001. Tunnel Management International. Washington, D.C. pp. 157–165. S2CID56401194. Archived from the original(PDF) on July 5, 2016. Retrieved September 16, 2020 – via Adfil.co.uk.
Shuttleworth, Peter (2001). Fire Protection of Concrete Tunnel Linings(PDF). 3rd International Conference on Tunnel Fires and Escape From Tunnels, October 9–11, 2001. Tunnel Management International. Washington, D.C. pp. 157–165. S2CID56401194. Archived from the original(PDF) on July 5, 2016. Retrieved September 16, 2020 – via Adfil.co.uk.