Highly Influenced

@article{Hartwig2005RepresentationsFT, title={Representations for the Drazin Inverse of a 2 x 2 Block Matrix}, author={Robert Hartwig and Xiezhang Li and Yimin Wei}, journal={SIAM J. Matrix Analysis Applications}, year={2005}, volume={27}, pages={757-771} }

- Published 2005 in SIAM J. Matrix Analysis Applications
DOI:10.1137/040606685