[1] Timoshenko SP, Gere JM. Theory of elastic stability. Courier Corporation; 1983.
[2] Wang CM, Wang CY, Nazmul IM. Stability Criteria for Euler Columns with Intermediate and End Axial Loads. J Eng Mech 2003;129:468–72. doi:10.1061/(ASCE)0733-9399(2003)129:4(468).
[3] HOBLIT FM. Buckling Load of a Stepped Column. J Aeronaut Sci 1951;18:124–6. doi:10.2514/8.1871.
[4] Salama MI. Buckling Loads of Columns with Suddenly Changing Cross-Section Subjected to Combined End and Intermediate Axial Forces. thirteen Int. Conf. Struct. Geotech. Eng. Ain Shams Univ., 2009.
[5] Pinarbasi S, Okay F, Akpinar E, Erdogan H. Stability analysis of two-segment stepped columns with different end conditions and internal axial loads. Math Probl Eng 2013;2013.