@article{10_1017_S0017089599000385,
     author = {\"Ulger, A.},
     title = {Central elements {ofA**} for certain {Banach} algebras {A} withoutbounded approximate identities},
     journal = {Glasgow mathematical journal},
     pages = {369--377},
     year = {1999},
     volume = {41},
     number = {3},
     doi = {10.1017/S0017089599000385},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089599000385/}
}