@article{ETNA_2007__26__a21,
     author = {Janovsk\'a, Drahoslava and Opfer, Gerhard},
     title = {Computing quaternionic roots by {Newton's} method},
     journal = {Electronic transactions on numerical analysis},
     pages = {82--102},
     publisher = {mathdoc},
     volume = {26},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2007__26__a21/}
}