@article{10_4153_CJM_1995_023_0,
     author = {Huang, Houben and Hudson, Timothy D.},
     title = {Factorization of {Positive} {Invertible} {Operators} in af {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {421--435},
     year = {1995},
     volume = {47},
     number = {2},
     doi = {10.4153/CJM-1995-023-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1995-023-0/}
}