@article{GMJ_2002__9_2_51079,
     author = {Castej\'on, A. and Corbacho, E. and Tarieladze, V.},
     title = {AMD-numbers, compactness, strict singularity and the essential spectrum of operators.},
     journal = {Georgian Mathematical Journal},
     pages = {227--270},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2002},
     zbl = {1052.47012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_2002__9_2_51079/}
}