From the same paper as the previous image.
References corresponding to (a) - (f):
[63] Bisagni C and Cordisco P 2003 An experimental investigation into the buckling and post-buckling of CFRP shells under combined axial and torsion loading Compos. Struct. 60 391–402
[69] Miller W, Smith C W, Scarpa F and Evans K E 2010 Flatwise buckling optimization of hexachiral and tetrachiral honeycombs Compos. Sci. Technol. 70 1049–56
[22] Winterflood J, Blair D G and Slagmolen B 2002 High performance vibration isolation using springs in Euler column buckling mode Physics Letters A 300 122–30
[70] Shaw A D, Neild S A, Wagg D J, Weaver P M and Carrella A 2013 A nonlinear spring mechanism incorporating a bistable composite plate for vibration isolation J. Sound Vib. 332 6265–75
[71] Pasala D, Sarlis A, Nagarajaiah S, Reinhorn A, Constantinou M and Taylor D 2013 Adaptive negative stiffness: new structural modification approach for seismic protection Journal of Structural Engineering 139 1112–23
[72] Sarlis A, Pasala D, Constantinou M, Reinhorn A, Nagarajaiah S and Taylor D 2013 Negative stiffness device for seismic protection of structures Journal of Structural Engineering 139 1124–33
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