@article{dhs95, author = {James W. Demmel and Nicholas J. Higham and Robert S. Schreiber}, journal = {Numer. Linear Algebra Appl.}, number = {2}, pages = {173-190}, title = {Stability of Block {$LU$} Factorization}, volume = {2}, year = {1995}, doi = {10.1002/nla.1680020208}, }