1. On properties of quadratic matrices;Aleksiejczyk;Math. Pannon.,2000
2. Generalized Inverses: Theory and Applications;Ben-Israel,2003
3. Matrix Theory with Applications;Goldberg,1991
4. Maximal elements under three partial orders;Hartwig;Linear Algebra Appl.,1992
5. On commutators of idempotents;Radjavi;Linear Multilinear Algebra,2002