@article{10_4153_CJM_1997_058_7,
     author = {Leen, Michael J.},
     title = {Factorization in the {Invertible} {Group} of a {C*-Algebra}},
     journal = {Canadian journal of mathematics},
     pages = {1188--1205},
     year = {1997},
     volume = {49},
     number = {6},
     doi = {10.4153/CJM-1997-058-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1997-058-7/}
}