@article{ELA_2009__18__a8,
     author = {Horn, Roger A. and Piazza, Giuseppe and Politi, Tiziano},
     title = {Explicit polar decomposition of complex matrices},
     journal = {The electronic journal of linear algebra},
     pages = {693--699},
     publisher = {mathdoc},
     volume = {18},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2009__18__a8/}
}