1. BAZELEY G. P.,CHEUNG Y. K., IRONS B. M. et ZIENKIEWICZ O. C., Triangular elements in bending-conforming and nonconforming solutions, Proc. Conf. Matrix Methods in Structural Mechanics, Air Forces Inst. of Tech., Wright Patterson A. F. Base, Ohio, 1965.
2. BOLLEY P. et CAMUS J., (to appear).
3. BRAMBLE J. H. et HILBERT S. R., Estimations of linear functionals on Sobolev spaces with applications to Fourier transforms and spline interpolation, J. Numer. Anal., 7, 1970, 112-124.2632140201.07803
4. CATTABRIGA L., Su un problema al contorno relativo al sistema di equazioni di Stokes. Rend. Sem. Mat. Padova, 1961, 1-33.1070650116.18002
5. CIARLET P. G. et RAVIART P.-A., General Lagrange and Hermite interpolation in R n $R^n$ with applications to finite element methods, Arch. Rat. Mech. Anal., 46, 1972, 177-199.3369570243.41004