@article{10_4064_aa104_2_1,
     author = {J. Kaczorowski and A. Perelli},
     title = {On the structure of the {Selberg} class, {IV:
} basic invariants},
     journal = {Acta Arithmetica},
     pages = {97--116},
     publisher = {mathdoc},
     volume = {104},
     number = {2},
     year = {2002},
     doi = {10.4064/aa104-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa104-2-1/}
}