The following publications are possibly variants of this publication:
- Natural Preconditioning and Iterative Methods for Saddle Point SystemsJennifer Pestana, Andrew J. Wathen. siamrev, 57(1):71-91, 2015. [doi]
- Using constraint preconditioners with regularized saddle-point problemsH. Sue Dollar, Nicholas I. M. Gould, Wil H. A. Schilders, Andy J. Wathen. coap, 36(2-3):249-270, 2007. [doi]
- Constraint-Style Preconditioners for Regularized Saddle Point ProblemsH. S. Dollar. siammax, 29(2):672-684, 2007. [doi]