@article{ELA_2011__22__a44,
     author = {Xu, Wei-Wei and Cai, Li-Xia and Li, Wen},
     title = {The optimal perturbation bounds for the weighted {Moore-Penrose} inverse},
     journal = {The electronic journal of linear algebra},
     pages = {521--538},
     publisher = {mathdoc},
     volume = {22},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2011__22__a44/}
}