1. Euler, Leonhard, Methodus inveniendi lineas curvas maximi minimive proprietate gaudentes, additamentum I de curvis elastics. Lausanne and Geneve. Opera Omnia I 24 (1744) 231–297.
2. Crandall, Stephen H., Norman C. Dahl and Thomas J. Lardner, An Introduction to the Mechanics of Solids, second ed. with SI units. McGraw-Hill 1978.
3. Ericksen, J. L., Equilibrium of bars. Journal of Elasticity 5 (1975) 191–201.
4. James, Richard D., Co-existent phases in the one dimensional static theory of elastic bars. Arch. Rational Mech. Anal. 72 (1979) 99–140.
5. Dunn, J. E., R. L. Fosdick and R. Stone, On minimizing states and their stability in elastic bars. In preparation.