1. Novel bending test method for polymer railway sleeper materials;Salih;Polymers,2021
2. Composite railway sleepers – Recent developments, challenges and future prospects;Ferdous;Compos. Struct.,2015
3. Axion. "ECOTRAX Composite Railroad Ties." https://axionsi.com/products/ecotrax-railroad/ (accessed 21 May, 2019).
4. TieTek. "TieTek Composite Crossties." http://www.tietek.net/ (accessed 21 May, 2019).
5. IntetriCo. "IntegriTies." https://www.integrico.com/integrities (accessed 21 May, 2019).