1. Atahan A. O. Bligh R. P. Bowen A. R. and Alberson D. C. (2000). “Applications of recycled materials in roadside safety devices.” Research Rep. 1458-3 Texas Transportation Institute Texas A&M Univ. College Station Tex.
2. Evaluation of Recycled Content Guardrail Posts
3. Bligh R. P. Alberson D. C. and Butler B. G. (1995). “Applications of recycled materials in roadside safety devices.” Research Rep. 1458-1 Texas Transportation Institute Texas A&M Univ. College Station Tex.
4. Bligh R. P. and Bullard L. D. Jr. (1995). “Crash testing and evaluation of round wood post W-beam guardrail system.” TTI Research Study No. 405391-1 Texas Transportation Institute Texas A&M Univ. System College Station Tex.
5. Hallquist J.O. (1998). LS-DYNA3D users manual Livermore Software Technology Corporation Livermore Calif.