@article{ETNA_2003__15__a11,
     author = {Knyazev, Andrew V. and Neymeyr, Klaus},
     title = {Efficient solution of symmetric eigenvalue problems using multigrid preconditioners in the locally optimal block conjugate gradient method},
     journal = {Electronic transactions on numerical analysis},
     pages = {38--55},
     publisher = {mathdoc},
     volume = {15},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2003__15__a11/}
}