@article{10_21136_MB_2004_133905,
     author = {Berkani, M. and Medkov\'a, D.},
     title = {A note on the index of $B${-Fredholm} operators},
     journal = {Mathematica Bohemica},
     pages = {177--180},
     publisher = {mathdoc},
     volume = {129},
     number = {2},
     year = {2004},
     doi = {10.21136/MB.2004.133905},
     mrnumber = {2073513},
     zbl = {1056.47011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2004.133905/}
}