1. Prager, W., and Rozvany, G.I.N., “Optimization of Structural Geometry,” Proc. Conf. Dynamical Systems, Academic Press, New York, 1977, pp. 265–294.
2. Maxwell, G., “On Reciprocal Figures, Frames, and Diagrams of Forces,” Sci. Papers II, Cambridge Univ. Press, 1890, pp. 175–177.
3. Michell, A.G.M., “The Limits of Economy of Material in Frame Structures,” Phil. Mag., Vol. 8, 1904, pp. 589–597.
4. Prager, W., and Rozvany, G.I.N., “Optimal Layout of Grillages,” J. Struct. Mech., Vol. 5, 1977, pp. 1–18.
5. Prager, W., Introduction to Structural Optimization, Springer-Verlag, Vienna, 1974.