@article{ELA_2009__18__a33,
     author = {Lippert, Ross A. and Strang, Gilbert},
     title = {The {Jordan} forms of $AB$ and $BA$},
     journal = {The electronic journal of linear algebra},
     pages = {281--288},
     publisher = {mathdoc},
     volume = {18},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2009__18__a33/}
}