1. Alfheim S, Flaate K, Refsdal, G et al (2011) The first EPS geoblock road embankment—1972. Paper presented at the 4th international conference on geofoam blocks in construction applications—EPS 2011, Lillestrøm, Norway, 6–8 June 2011
2. Norwegian Road Research Laboratory (NRRL) (1987) Plastic Foam in Road Embankments, Meddelelse nr. 61, Oslo
3. EPS Development Organization (EDO) (1996) Proceedings of international symposium on EPS construction method, Tokyo
4. Proceedings of the 3rd International Conference on Geofoam (2001), Salt Lake City, USA, 10–12 Dec 2001
5. Proceedings of the 4th International Conference on Geofoam blocks in Construction Applications—EPS 2011, Lillestrøm, Norway, 6–8 June 2011