1. The coupling method for solving integral equations;Bart,1984
2. Matricial coupling and equivalence after extension;Bart,1992
3. Schur Complements and Strong Versions of Matricial Coupling and Equivalence after Extension;Bart,1992
4. What are Schur complements anyway?;Carlson;Linear Algebra Appl.,1986
5. Completing a matrix when certain entries of its inverse are specified;Fiedler;Linear Algebra Appl,1986