N. Jones, W.Abramowicz, Static and dynamic axial crushing of circular and square tubes, Metal forming and impact mechanics, NewYork: Pergamon Press, pp. 225-247, 1985.
 J. M. Alexander, An approximate analysis of the collapse of thin cylindrical shells under axial loading, The Quarterly Journal of Mechanics and Applied Mathematics, Vol. 13, pp. 11–16, 1960.
 W. Johnson, S. R. Reid, Metallic energy dissipating systems, Applied Mechanics Reviews, Vol. 31, pp. 277-288, 1978.
 G. H. Daneshi, S. J. Hosseinipour, Elastic–plastic theory for initial buckling load of thin-walled grooved tubes under axial compression, Journal of Materials Processing Technology, Vol. 125, pp.826-832, 2002.
 M. M. Abedi, A. Niknejad, G. H. Liaghat, M. ZamaniNejad, Prediction of the Mean folding force during the axial compression in foam-filled grooved tubes by the oretical analysis, Materials and Design, Vol. 37, pp.144-151, 2012.
 Y. H. Luo, Z. W. Huang, X. L. Zhang, FEM analysis of external inversion and energy absorbing characteristics of inverted tubes, Journal of Materials Processing Technology, Vol. 188, pp. 279-282, 2007.
 S. Mori, K. I. Manabe, H. Nishimura, K. Hirose, Experimental analysis of the flattening of the cross-section spring back and the bending moment of clad tubes in uniform bending, Journal of Materials Processing Technology, Vol. 66, pp. 270-276, 1997.
 A. Niknejad, B. Rezaei, Gh. H. Liaghat, Empty circular metal tubes in the splitting process-theoretical and experimental studies, Thin-walled Structures, Vol. 72, pp. 48-60, 2013.
 N. K. Gupta, H. Abbas, Axisymmetric axial crushing of thin frusta, Thin-Walled Structures, Vol. 36, pp. 169–79, 2000.
 N. K. Gupta, Venkatesh, Experimental and numerical studies of impact axial compression of thin-walled conical shells, International Journal of Impact Engineering, Vol. 34, pp. 708–720, 2007.
 L. i. Mirfenderesk, M. Salimi, S. Ziaei-Rad, Parametric study and numerical analysis of empty and foam-filled thin-walled tubes under static and dynamic loadings, International Journal of Mechanical, Vol. 50, pp. 1042–1057, 2008.
 G. L. Easwara Prasad, N. K. Gupta, An experimental study of deformation modes of domes and large-angled frusta at different rates of compression, International Journal of Impact Engineering, Vol. 32, pp. 400–15, 2005.
 Z. Ahmad, D. P. Thambiratnam, Crushing response of foam-filled conical tubes under quasi-static axial loading, Material and Design, Vol. 30, pp.2393–2403, 2009.
 Z. Ahmad, D. P. Thambiratnam, Dynamic computer simulation and energy absorption of foam-filled conical tubes under axial impact loading, Computers and Structures, Vol. 87, pp. 186–197, 2009.
 Z. Ahmad, D. P. Thambiratnam, A. C. C. Tan, Dynamic energy absorption characteristics of foam-filled conical tubes under oblique impact loading, International Journal of Impact Engineering, Vol. 37, pp. 475-488, 2010.
 M. Shariati, H. R. Allahbakhsh, Numerical and experimental investigations on the buckling of steel semi-spherical shells under various loadings, Thin-Walled Structures, Vol. 48, pp. 620-628, 2010.
 A. Ghamarian, H. R. Zarei, Crashworthiness investigation of conical and cylindrical end-capped tubes under quasi static crash loading, International Journal of Crashworthiness, pp. 19-28, 2012.
 A. Ghamarian, H. R. Zarei, M. T. Abadi, Experimental and numerical crashworthiness investigation of empty and foam-filled end-capped conical tubes, Thin-Walled Structures, Vol. 9, pp. 1312–1319, 2011.
 A. Ghamarian, M. A. Farsi, Experimental and numerical analysis of thin-walled structures combined axial collapse, Journal of Mechanical Aerospace, Vol. 8, pp. 99-109, 2012 (In Persian فارسی).
 A. Ghamarian, H. R. Zarei, M. A. Farsi, N. Ariaeifar, Crashworthiness investigation of the empty and foam-filled conical tube with shallow spherical caps, Strain, Vol. 49, pp. 199–211, 2013.
 H. R. Zarei, A. Ghamarian, Experimental and numerical crashworthiness investigation of empty and foam-filled thin-walled circular tubes with shallow spherical caps, Experimental Mechanics, Vol. 54, pp.115–126, 2014.
 Karlson & Sorensen, ABAQUS User’s Manual Hibbitt, Pawtucket,1999.
 S .Azarakhsh, A. Rahi, A. Ghamarian, H. Motamedi, Axial crushing analysis of empty and foam-filled brass bitubular cylinder tubes, Thin-Walled Structures, Vol. 95, pp. 60–72, 2015.