@article{ZNSL_2003_296_a1,
     author = {A. George and Kh. D. Ikramov},
     title = {Block $LU$ factorization is stable for block matrices whose inverses are block diagonally dominant},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {15--26},
     publisher = {mathdoc},
     volume = {296},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2003_296_a1/}
}