@article{10_1017_S001708950000639X,
     author = {Nagy, B.},
     title = {Finitely spectral operators},
     journal = {Glasgow mathematical journal},
     pages = {95--112},
     year = {1986},
     volume = {28},
     number = {1},
     doi = {10.1017/S001708950000639X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000639X/}
}