1. and , ‘Experience with the patch test for convergence of finite elements’, in Mathematical Foundations of the Finite Element Method with Applications to Partial Differential Equations (Ed. ), Academic Press, New York and London, 1972.
2. and , Techniques of Finite Elements, Ellis Horwood, Chichester, England. 1979.
3. and , ‘A new approach for deriving “good” finite elements’, Proc. Conf. on Mathematics of Finite Elements and Applications, Brunel Univ., 1975;
4. also The Mathematics of Finite Elements and Applications, Vol. II (Ed. ), Academic Press, London, 1976.
5. ‘Finite elements based on a new procedure for computing stiffness coefficients’, Report No. 76-1, Div. Struct. Mech., Norwegian Inst. of Technology, Trondheim, 1976.