@article{ETNA_2008__29__a4,
     author = {Popa, Constantin},
     title = {Algebraic multigrid smoothing property of {Kaczmarz's} relaxation for general rectangular linear systems},
     journal = {Electronic transactions on numerical analysis},
     publisher = {mathdoc},
     volume = {29},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2008__29__a4/}
}