1. Xu, B. Y., Liu, X. S.: Plastic Limit Analysis of Structures. China Architecture & Building Press, Beijing (1985)
2. Chen, G., Liu, Y. H.: Numerical Theories and Engineering Methods for Structural Limit And Shakedown Analyses. Science Press, Beijing (2006) (in Chinese)
3. Hayes, D. J., Marcal, P. V.: Determination of upper bounds for problems in plane stress using finite element techniques. Int. J. Mech. Sci. 9, 245–251 (1967)
4. Belytschko, T, Hodge, P. G.: Plane stress limit analysis by finite element. J. Eng. Mech. Div. 96, 931–944 (1970)
5. Zhang, P. X., Lu, M. W., Hwang, K. C.: A mathematical programming algorithm for limit analysis. Acta Mech Solida Sin. 23, 433–442 (1991)