@article{10_4064_sm150_2_2,
     author = {Maria Fragoulopoulou},
     title = {The {Shirali{\textendash}Ford} theorem as a consequence {of
Ptak} theory for hermitian {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {121--132},
     year = {2002},
     volume = {150},
     number = {2},
     doi = {10.4064/sm150-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm150-2-2/}
}