1. Shorted operators II;Anderson;SIAM J. Appl. Math.,1975
2. What are Schur complements, anyway?;Carlson;Linear Algebra Appl.,1986
3. Generalized inverse invariance, partial orders, and rank minimization;Carlson,1987
4. Shorted operators and rank decomposition Matrices;Goller;Linear Algebra Appl.,1986
5. How to order regular elements?;Hartwig;Math. Japon.,1980