@article{NUMA_1993__66_3_133760,
     author = {N. Levenberg and L. Reichel},
     title = {A generalized {ADI} iterative method.},
     journal = {Numerische Mathematik},
     pages = {215--234},
     year = {1993},
     volume = {66},
     number = {3},
     zbl = {0797.65030},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1993__66_3_133760/}
}