1. Bjørstad, P.E., “Numerical Solution of the Biharmonic Equation”, Ph.D. Thesis, Stanford 1980. See also SIAM J. Numer. Anal. 20, 1983, pp. 59-71.
2. Bjørstad, P.E. and Widlund, O.B., to appear 1983.
3. “The Finite Element Method for Elliptic Problems”;Ciarlet,1978
4. Concus, P., Golub, G. and O'Leary, D., Proc. Symp. Sparse Matrix Computations, (Argonne National Lab., 1975), Academic Press, 1975.
5. Manifestations of the Schur complement