1. O. Axelsson, On iterative solution of elliptic difference equations on a mesh-connected array of processors, Intern. Journal of High Speed Computing, 1 (1989), pp. 165–184.
2. O. Axelsson and V. Barker, Finite Element Solution of Boundary Value Problems. Theory and Computation, Academic, New York, 1984.
3. O. Axelsson and V. Eijkhout, Rebust vectorizable preconditioners for three-dimensional elliptic difference equations with anisotropy, in Algorithms and Applications on Vector and Parallel Computers, H. te Riele, T. J. Dekker, and H. van der Vorst, eds., Elsevier (North Holland), Amsterdam, 1987, pp. 279–306.
4. O. Axelsson and I. Gustafsson, Preconditioning and two-level multigrid methods of arbitrary degree of approximation, Math. Comp., 40 (1983), pp. 214–242.
5. R. Beauwens, Upper eigenvalue bounds for pencils of matrices, Linear Algebra Appl., 62 (1984), pp. 87–104.