Gholampour, S., K. Hajirayat, A. Erfanian, A. R. Zali, and E. Shakouri. “Investigating the Role of Helmet Layers in Reducing the Stress Applied During Head Injury Using FEM”. International Clinical Neuroscience Journal, vol. 4, no. 1, Apr. 2017, pp. 4-11, doi:10.22037/icnj.v4i1.16691.