%0 Journal Article %A J. Kaczorowski %A A. Perelli %T On the structure of the Selberg class, IV: basic invariants %J Acta Arithmetica %D 2002 %P 97-116 %V 104 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa104-2-1/ %R 10.4064/aa104-2-1 %G en %F 10_4064_aa104_2_1