1. and , ‘Marriage à la mode—the best of both worlds (finite elements and boundary integrals)’, in and (eds.), Energy Methods in Finite Elements Analysis, Wiley, Chichester, 1979.
2. , Boundary Element Methods in Engineering Science, McGraw-Hill, London, 1981.
3. ‘On asymptotic error estimates for combined BEM and FEM’, in and (eds.), Finite Elements and Boundary Element Techniques from Mathematical and Engineering Point of View, Springer, Berlin, 1988.
4. Conjugate gradient method with preconditioning by projector