@article{10_4064_sm_80_2_191_195,
     author = {Vladim{\'\i}r M\"uller},
     title = {Inverse elements in extensions of {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {191--195},
     publisher = {mathdoc},
     volume = {80},
     number = {2},
     year = {1984},
     doi = {10.4064/sm-80-2-191-195},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-80-2-191-195/}
}