@article{ETNA_2010__36__a3,
     author = {Gutknecht,  Martin H.},
     title = {IDR explained},
     journal = {Electronic transactions on numerical analysis},
     year = {2010},
     volume = {36},
     zbl = {1189.65060},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2010__36__a3/}
}