@article{SF_1984__28_134657,
     author = {A. Nagy},
     title = {Band decomposition of weakly exponential semigroups.},
     journal = {Semigroup forum},
     pages = {303--312},
     publisher = {mathdoc},
     volume = {28},
     year = {1984},
     zbl = {0527.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__28_134657/}
}