@article{ETNA_2015__43__a5,
     author = {Mach, Thomas and Prani\'c, Miroslav S. and Vandebril, Raf},
     title = {Computing approximate (block) rational {Krylov} subspaces without explicit inversion with extensions to symmetric matrices},
     journal = {Electronic transactions on numerical analysis},
     publisher = {mathdoc},
     volume = {43},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2015__43__a5/}
}