@article{ETNA_2007__26__a14,
     author = {Benzi, Michele and U\c{c}ar, Bora},
     title = {Block triangular preconditioners for $M$-matrices and {Markov} chains},
     journal = {Electronic transactions on numerical analysis},
     pages = {209--227},
     publisher = {mathdoc},
     volume = {26},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2007__26__a14/}
}