1. Generalized Inverse of Linear Transformation;Campbell,1979
2. N. Castro González, J.J. Koliha, Y. Wei, On integral representations of the Drazin inverse in Banach algebras, Proc. Edinburgh Math. Soc. 45 (2002) 327–331
3. Integral representation of the Drazin inverse AD;Castro González;Electronical J. Linear Algebra,2002
4. N. Castro González, J.J. Koliha, Y. Wei, Integral representations of the Drazin inverse in C*-algebra, preprint
5. A Drazin inverse for rectangular matrices;Cline;Linear Algebra Appl.,1980