[1] Ziemian, R. D. (2010). Guide to stability design criteria for metal structures, 6th Edition, John Wiley & Sons, Inc, pp. 12-114
[2] Elishakoff,I. (2004). Eigenvalues of Inhomogenous Structures: Unusual Closed-form Solutions, CRC Press.
[3] Riahi, H. T., Shojaei Barjoui , A., Bazazzadeh, S., and Etezady, S.M.A. (2012). Buckling Analysis of Non-Prismatic Columns Using Slope-Deflection Method. 15th World Conference on Earthquake Engineering. Lisbon, Portugal, September 28700-28710.
[4] Serna , M .A. , Ibanez, J .R. , Lopez, A.(2011). Elastic flexural buckling of non-uniform members: Closed-form expression and equivalent load approach.
Journal of Constructional Steel Research, Vol. 67, pp. 1078-1085.
[5] Hadianfard, M .A., Sharbati. R. (1392). Numerical simulation of retracted steel bonding connections and investigation of the role of connecting components in its behavior. Journal of Modeling in Engineering, Vol. 34, pp. 11-24.
[6] Fafhi, M .A., Hasani. R. (1396). Finite element modeling A proposed rigid connection for prefabricated concrete buildings using a steel interface element. Journal of Modeling in Engineering, Vol. 49, pp. 189-200.
[7] Hasani, S.M.R., Mahmoudabadi. M., Danaei, R,. (1397). Investigating effect of boundary conditions on columns’ buckling. Journal of Structural and Construction Engineering(JSCE), Vol. 5, pp. 143-156.
[8] Aristizabal-Ochoa,J. D. (2013). Stability of slender columns on an elastic foundation with generalised end conditions. Ingeniera e Investigacion, Vol. 33, No. 3, pp. 34 - 40.
[9] Arboleda-Monsalve, L. G., Zapata-Medina, D. G. and AristizabalOchoa,J. D.,Timoshenko. (2008). beam-column with
generalized end conditions on elastic foundation: Dynamic-stiffness matrix and load vector., Journal of Sound and Vibration,
Vol. 310, pp.1057-1079.
[10] Zapata-Medina, D. G. Arboleda-Monsalve, L. G. AristizabalOchoa, J. D. (2010). Static Stability Formulas of a Weakened
Timoshenko Column: Effects of Shear Deformations. J. of Engineering Mechanics-ASCE, Vol. 126, No. 12,pp.1-9.
[11] Eisenberger, M. (1991), Buckling Loads For Variable Cross-Section Members With Variable Axial Forces, Int.J.Solids Structures, Vol. 27, pp. 135-143.
[12] Yoo, C. H., Lee, L. (2011). Stability of structures principles and applications, Elsevier, pp. 133.
[13] MATLAB, "The Language of Technical Computing", (2008), Version 7.6.0. The Math-works Inc.: Natick, MA