@article{10_4064_sm187_3_5,
     author = {J. J. Grobler and H. Raubenheimer},
     title = {The index for {Fredholm} elements
 in a {Banach} algebra via a trace},
     journal = {Studia Mathematica},
     pages = {281--297},
     year = {2008},
     volume = {187},
     number = {3},
     doi = {10.4064/sm187-3-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm187-3-5/}
}