@article{10_21136_MB_2009_140669,
     author = {Berkani, M. and Zariouh, H.},
     title = {Extended {Weyl} type theorems},
     journal = {Mathematica Bohemica},
     pages = {369--378},
     publisher = {mathdoc},
     volume = {134},
     number = {4},
     year = {2009},
     doi = {10.21136/MB.2009.140669},
     mrnumber = {2597232},
     zbl = {1211.47011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2009.140669/}
}