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2. E. P. Popov, Theory and Calculation of Flexible Elastic Rods (Nauka, Moscow, 1986) [in Russian].
3. S. V. Levyakov, “States of Equilibriumand Secondary Buckling of a Straight Rod Loaded by an Axial Force,” Zh. Prikl. Mekh. Tekhn. Fiz 42 (2), 153–159 (2001) [J. Appl. Mech. Tech. Phys. (Engl. Transl.) 42 (2), 321–327 (2001)].
4. S. P. Timoshenko, Stability of Rods, Plates, and Shells (Nauka, Moscow, 1971) [in Russian].
5. A. S. Vol’mir, Stability of Deformable Systems (Nauka, Moscow, 1967) [in Russian].