@article{JRAM_1986__366_152811,
     author = {H. Bercovici and C. Foias and C. Pearcy},
     title = {A spectral mapping theorem for functions with finite {Dirichlet} integral.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--17},
     publisher = {mathdoc},
     volume = {366},
     year = {1986},
     zbl = {0575.47004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1986__366_152811/}
}