1. Three remarks on the theory of the ideal plastic body;v. Mises, R.,1948
2. W. Prager and H. G. Hodge, Jr., Perfectly plastic solids, Wiley, New York, 1951; Chapter 3.
3. Mathematics in Science and Engineering, Vol. 2;Thomas, Tracy Y.,1961
4. The ridge of a Jordan domain and completely plastic torsion;Ting, Tsuan Wu;J. Math. Mech.,1966
5. Annals of Mathematics Studies, No. 27;Pólya, G.,1951