O. Prentkovskis, A. Beljatynskij, R. Prentkovskienė, I. Dyakov, and L. Dabulevičienė, “A study of the deflections of metal road guardrail elements”, Transport, vol. 24, no. 3, pp. 225–233, Sep. 2009, doi: 10.3846/1648-4142.2009.24.225-233.