1. A black box generalized conjugate gradient solver with inner iterations and variable-step preconditioning;Axelsson;SIAM J. Matrix Anal. Appl.,1991
2. A parallel restructured version of GMRES(m);De Sturler,1991
3. A parallel variant of GMRES(m);De Sturler,1991
4. Nested Krylov methods and preserving the orthogonality;De Sturler,1993
5. Solving Linear Systems on Vector and Shared Memory Computers;Dongarra,1991