1. Analytical and numerical studies of the structure of steady separated flows
2. The Finite Element Method for Elliptic Problems, North-Holland, Amsterdam, 1977.
3. and , ‘Conforming and non-conforming finite element methods for solving the stationary Stokes equations’, RAIRO 7, rev. 3, 33-76 (1973).
4. ‘An analysis of the convergence of mixed finite element methods’, RAIRO 11, rev. 3, 341-354 (1977).
5. ‘The construction of approximately divergence-free finite elements’, in Mathematics of Finite Elements and Applications (Ed. ), Academic Press, New York, 1979.