1. FRAEIJS DE VEUBEKE, B.M., “Displacement and Equilibrium Models in the Finite Element Method”, Stress Analysis, (editors: O.C. Zienkiewicz and G.S. Holister), 1965, Chapter 9, John Wiley and Sons, Inc., New York.
2. CLOUGH, R.W., “The Finite Element Method in Structural Mechanics”,Stress Analysis, (editors: O.C. Zienkiewicz and G.S. Holister), 1965, Chapter 7, John Wiley and Sons, Inc., New York.
3. ZIENKIEWICZ, O.C. and CHEUNG, Y.K., The Finite Element Method in Structural and Continuum Mechanics, 1967, McGraw-Hill Book Co., Inc., New York and London.
4. MICHELL, J.H., “On the Direction Determination of Stress in an Elastic Solid with Application to the Theory of Plates”, Proc. London Math. Soc., Vol. 31, 1899, p. 100.
5. MINDLIN, R.D., “The Analogy Between Multiply Connected Slices and Slabs”, Quart. Appl. Math., Vol. 4, 1946, p. 279; Vol. 5, 1947, p. 238.