1. Pseudo-inverse in associative rings and semigroups;Drazin;Am. Math. Mon.,1958
2. Israel, A.B., and Greville, T.N.E. (1974). Generalized Inverses: Theory and Applications, Wiley.
3. Campbell, S.L., and Meyer, C.D. (1991). Generalized Inverses of Linear Transformations, Dover.
4. Some additive results on Drazin inverse;Hartwig;Linear Algebra Appl.,2001
5. On the Drazin inverse of block matrices and generalized Schur complement;Appl. Math. Comput.,2009