@article{10_4153_CJM_1987_030_1,
     author = {Hile, G. N. and Pfaffenberger, W. E.},
     title = {Idempotents in {Complex} {Banach} {Algebras}},
     journal = {Canadian journal of mathematics},
     pages = {625--630},
     year = {1987},
     volume = {39},
     number = {3},
     doi = {10.4153/CJM-1987-030-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-030-1/}
}