R. Mohammadzadeh, M.M. Najafizadeh, M. Nejati, Buckling of 2D-FG Cylindrical Shells under Combined External Pressure and Axial Compression, Advances in Applied Mathematics and Mechanics, 5(3) (2015) 391- 406.
 C.-P. Wu, Y.-C. Chen, S.-T. Peng, Buckling analysis of functionally graded material circular hollow cylinders under combined axial compression and external pressure, Thin-Walled Structures, 69 (2013) 54-66.
 F. Plantema, Sandwich Construction, New York: Johen Wiley & Inc, (1966).
 Y. Frostig, M. Baruch, O. Vilnay, I. Sheinman, High-Order Theory for Sandwich-Beam Behavior with Transversely Flexible Core, 1992.
 E. Bozhevolnya, J. Sun, Free Vibration analysis of Sandwich Beams, Sandwich struct Matter, 6 (2004) 47-76.
 Y. Frostig, O.T. Thomsen, High-order free vibration of sandwich panels with a flexible core, International Journal of Solids and Structures, 41(5) (2004) 1697-1724.
 G. Schwarts, Y. Frostig, Free Vibrationof Delaminated Unidirectional Panels with a Transversely Flexible Core and General Boundary Conditions-a High-order Approach - Google Search, J Sandwich Struct Mater, 10 (2008) 99-131.
 A. Noor, J. M. Peters, W. Scott Burton, Three-Dimensional Solutions for Initially Stressed Structural Sandwiches, 1994.
 W. Ji, A. Waas, Global and Local Buckling of a Sandwich Beam, 2007.
 W. Ji, A.M. Wass, Elastic analysis of Sandwich Panel Buckl Problem: Benchomark Solutions and Finite Element Formulations, ZAMP, 61 (2010) 897-917.
 T. Kant, K. Swaminathan, Analytical solutions for the static analysis of laminated composite and sandwich plates based on a higher order refined theory, Composite Structures, 56(4) (2002) 329-344.
 A.K. Nayak, R.A. Shenoi, S.S.J. Moy, Dynamic response of composite sandwich plates subjected to initial stresses, Composites Part A: Applied Science and Manufacturing, 37(8) (2006) 1189-1205.
 D. Bushnell, S. Smith, Stress and buckling of nonuniformly heated cylindrical and conical shells, AIAA Journal, 9(12) (1971) 2314-2321.
 J.B. Dafedar, Y.M. Desai, A.A. Mufti, Stability of sandwich plates by mixed, higher-order analytical formulation, International Journal of Solids and Structures, 40(17) (2003) 4501-4517.
 M. Koizumi, FGM activities in Japan, Composites Part B: Engineering, 28(1) (1997) 1-4.
 S. Suresh, A. Mortnsen, Fundementals of Functionally Materials, IOM Communications, London, (1998).
 B. Sankar, J. T. Tzeng, Thermal Stresses in Functionally Graded Beams, 2002.
 N. FIN, Buckling of Conical Shells Subjected to External Lateral Pressure, Trans Roy Inst Technol, Stockholm, 10 (1947) 1-21.
 K. M. Mushtari, A. V. Sachenkov, Stability of Cylindrical and Conical Shells of Circular Cross Section, with Simultaneous Action of Axial Compression and External Normal Pressure, 1958.
 A.H. Sofiyev, The stability of functionally graded truncated conical shells subjected to aperiodic impulsive loading, International Journal of Solids and Structures, 41(13) (2004) 3411-3424.
 L.K. Chang, S.Y. Lu, Thermal buckling of conical shells, AIAA Journal, 5(10) (1967) 1877-1882.
 L.K. Chang, S.Y. Lu, Nonlinear thermal elastic buckling of conical shells, Nuclear Engineering and Design, 7(2) (1968) 159-169.
 P.C. Dumir, G.P. Dube, A. Mallick, Axisymmetric static and dynamic buckling of laminated thick truncated conical cap, 2003.
 J. Blachut, O. Ifayefunmi, M. Corfa, Collapse and Buckling of Conical Shells, 2011.
 J. Kim, S.-R. Lee, S.-S. Park, Analyses of thrust bearings in scroll compressors considering keyways, Tribology International, 43(4) (2010) 728-736.
 J. Singer, A. Eckstein, M. Baruch, BUCKLING OF CONICAL SHELLS UNDER EXTERNAL PRESSURE, TORSION AND AXIAL COMPRESSION, 1962.
 J. Singer, The Effect of Axial Constraint on the Instability of Thin Conical Shells Under External Pressure, Journal of Applied Mechanics, 29(1) (1962) 212-214.
 G.A. Thurston, Effect of Boundary Conditions on the Buckling of Conical Shells Under Hydrostatic Pressure, Journal of Applied Mechanics, 32(1) (1965) 208-209.
 M. Baroch, Harar, J. Singr, Infuence of in-plane Boundary Condition on the Stability of Conical Shells Under Pressure, .Israel J Technol, 5 (1967) 12-24.
 M.M. Kheirikhah, S.M.R. Khalili, K. Malekzadeh Fard, Biaxial buckling analysis of soft-core composite sandwich plates using improved high-order theory, European Journal of Mechanics - A/Solids, 31(1) (2012) 54-66.
 J. seidi, S.M.R. Khalili, Analytical of sandwich truncated conical shell with nano FGM layers in high order theory, Mechanical and Mechatoronic conferene, Tehran. Iran, (2016), (In Persian).
 J. seidi, S.M.R. Khalili, Buckling Analytcal of sandwich truncated conical shell with three order theory, Civil, Electric and Mechanical conferene, Gorgan. Iran, (2014), (In Persian).
 J. seidi, S.M.R. Khalili, Analytcal of sandwich truncated conical shell with soft core and FGM layers in high order theory, Mechanical engineering and Electric conferene, Tehran. Iran, (2015), (In Persian).
 N. I. Karpov, O. A. Karpova, Stability of conical shell under combined load, 1981.
 A.H. Sofiyev, The buckling of FGM truncated conical shells subjected to combined axial tension and hydrostatic pressure, Composite Structures, 92(2) (2010) 488-498.
 A.H. Sofiyev, On the buckling of composite conical shells resting on the Winkler–Pasternak elastic foundations under combined axial compression and external pressure, Composite Structures, 113 (2014) 208-215.
 J.N. Reddy, Thermal Mechanical Behavior of Functionally Graded Materials, Texas, 2(21-30) (1998).
 F. Javad, M.H. Hajmohammadi, Study Effect of Geometrical Parameters on the Buckling of Cylindrical Shells under Hydrostatic Pressure, Indian Journal of Science Technology, 6(11) (2013) 5527-5532.
 B.S. Golzan, H. Showkati, Buckling of thin-walled conical shells under uniform external pressure, Thin-Walled Structures, 46(5) (2008) 516-529.