1. Fitch inertial barrier system design manual . (1975). FIBCO Inc. Boston Mass.
2. Hirsch T. J. and Ivey D. L. (1969). “Vehicle impact attenuation by modular crash cushion.” Res. Report 146‐1 Texas Transportation Institute Texas A&M University College Station Tex.
3. Michie J. D. (1981). “Recommended procedures for the safety performance evaluation of highway appurtenances.” Report 230 National Cooperative Highway Research Program Washington D.C.
4. Sicking D. L. and Ross H. E. Jr. (1985). “Roadside concrete barriers: Warrants and end treatment.” Res. Report 346‐1F Texas Transportation Institute Texas A&M University System College Station Tex.
5. Sicking D. L. and Ross H. E. Jr. (1986). “Low‐maintenance end treatment for concrete barriers.” Transp. Res. Record 1065 Transportation Research Board Washington D.C. 31–37.