@article{10_1017_S0017089500004948,
     author = {Al-Khezi, S.},
     title = {Analytic functions of a prespectral operator},
     journal = {Glasgow mathematical journal},
     pages = {171--175},
     year = {1982},
     volume = {23},
     number = {2},
     doi = {10.1017/S0017089500004948},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004948/}
}